I can't be the only Cary Audio DMS-600 user experiencing this problem streaming Qobuz ...

Thank you for your suggestions.  The Zxyel EMG3415-B10A is a combination modem/router/gateway provided by Cincinnati Bell Fioptics. My connection is fine.  If I was having dropouts it would affect all of my connections throughout my home and that is not the case.  The Fioptics technician was more than willing to give me a new Zxyel unit, but since I have an isolated problem with only one piece of equipment, it was determined that replacing this unit would not solve my problem.  To reiterate, I have no dropouts when streaming music from my other receivers/devices throughout my home.  That includes streaming Tidal from my Sonos S2 app.
But complaining is not solving the problem so through my local A/V dealer, I have ordered the XWR-3150 Luxul router, and a new Luxul XGS-1024S 24 port gigabit switch.  We will only use the Zxyel unit as a modem.  The Luxul router will control everything else.  In addition to installing these new devices, signal strength measurements will be taken throughout my home and I might add an additional access point in my lower level where my stereo is located to enhance my already acceptable wireless signal.  I already employ a Luxul XAP-1510 access point in the center of my main floor.  Over 2 floors, I am covering approx. 4,000 square feet. 

My whole house is hardwired for ethernet so I am only using a couple of ancillary devices as controllers for the Sonos and Cary apps.  At the suggestion of Cary Audio, I even removed the 2 Wi-fi antennas from the DMS-600 and only use Bluetooth..
So hopefully within the next month when the A/V technician becomes available, I will enhance my Ethernet and Wi-fi coverage throughout my home.  If spending over $1,000 to address this problem does not solve it, at least I will have a better internet/Wi-fi experience moving forward and it will provide me with new ammunition to go back to Cary Audio and tell them they have a problem with their 2.0 streaming app.  No more excuses from Cary as I have addressed what they consider to be a network problem on my end.  Of course none of these manufacturers ever accept responsibility for anything.  It is always the customer's fault.  Well I am putting my money where my mouth is and I will hope for the best.  I will provide an update in the future. Thank you for your continued interest and help.
One last comment:  When I perform a factory reset on the DMS-600, I cannot figure out why it works fine for a day or two and then keeps stopping periodically.  When streaming Tidal, my streamer continues to stop after the first 30 minutes and then another hour later and so on.  This has occurred every time I stream Tidal from this unit since the last reset.  Spotify and internet radio is not affected. Sure doesn't seem like a network issue to me.  Cary wants me try a static address for CloudFlare's public DNS server and that is what I am going to do.  I can always change it back to DHCP.

@vpm, Your above action plan is excellent and I hope it solves your Tidal steaming issue.  

Like you, I also do also not understand "how everything played fine for 2 days and then on the 3rd day Tidal stopped after 32 minutes and then stopped another hour later”.  Why does it play perfectly for 2-days and then stop on the next day (stopping periodically)?  

BTW, I also own the LUXUL Wireless Router AC3100 Wireless Router, the XAP-1510 AC1900 Access Point and the LUXUL 1008 8-port digital switch.   These are great products and, I hope, there use will solve this very strange streaming issue.   

just found this thread.   My DMS 600 has had some odd problems streaming Tidal with the new app.   If I add new tracks or albums to  my tidal lists they sometimes don't show up on the Cary app.  I have found that if I scroll down to the bottom of the list and scroll back up to the top they appear.  Today I could not get Tidal to load anything after logging in through Cary.  So I logged out of tidal and now the cary app, while recognizing and acknowledging that I am entering the correct name and password, will not sign on to my tidal acct.   I have been having these issues since the new app was introduced. I have already followed Cary suggestion of re loading the app and going through a re set.  It is getting worse, not better.  Any one else have issues like I am experiencing?  I for one am getting fed up

At least for now, I was able to solve the problem with streaming Tidal on my Cary DMS 600 using the Cary 2.0 streaming app.  My problem was with Tidal stopping periodically while streaming albums.  So I bridged my ISP provided Gateway Modem/Router and added a Luxul XWR-3150 router.  I upgraded my Gigabit switch to a Luxul XGS-1024S 24 port unit.  I also added a second access point to my system.  I now have a Luxul XAP-1610, 4 antenna access point in the center of my home on the first level and a Luxul XAP-1510, 3 antenna access point on the lower level.  Google DNS is now the primary server and my ISP servers are secondary for my system.  Running a speed test revealed that my download speed is 524.3 Mb/sec and upload speed is 136 Mb/sec.  All of my A/V equipment is hard wired over Ethernet.  So by throwing money at this problem, I now have a better wired internet and Wi-fi experience going into the future.  I am just so happy that Tidal is back to normal (at least for now) as I have been playing my system 3-4 hours per day over this past weekend with no stoppage issues. 

One additional comment regarding the incorporation of the new Luxul Gigabit switch.  I installed this unit a week prior to the A/V technician's arrival and over the past week noticed an improvement when streaming Tidal as I did not experience any stoppage issues.  While I was told that changing this piece alone probably did not solve my problem, I definitely noticed an improvement.

With respect to gjkphd,  I felt your pain.  I have had the same problems as you have ever since Cary came out with the new app.  Of course, after a while the Sales manager was telling me that I was the only person having a problem, which I found hard to believe and your post confirms this.  Following Cary's reset instructions does not solve the problem.  Cary keeps telling me it is a network problem. If so, then why did I not have any problems for 3 years using the their original app.  Anyway, there are service bulletins regarding this matter on the Cambridge Audio and Bluesound Node websites.  Check them out.  By assigning a Static public DNS address to either your complete network or just the DMS 600 should solve this problem.  That is what I finally had to do as Cary has admitted that they are not IT guys.  At least the sales manager went out of his way to assist me by directing me to one of these bulletins.  We are not the only ones having problems with Tidal or even Quobuz. I hope you find the information that I have provided somewhat helpful.