Similar issue with me. I was streaming wirelessly to a Musical Fidelity MX-Stream using my iPhone (12 Pro Max) with Roon (+ Qobuz) in full hi-res. Ethernet and WiFi speed > 150 Mbits/sec. Everything sounded great but every so often there would be an annoying crackling sound, a little like when listening to a vinyl record! No dropouts of music, however, just a crackling sound. I was tearing my hair out with a solution (e.g. replacing all the USB cables, purchasing a power conditioner and ethernet switch, etc) but then realised that using my iPad Pro (M1 chip) as my iOS device to play music didn't give these issues. So it appears related to the processing power of the iPhone or even its hardware design, unless I'm mistaken. Anyway, potentially this issue will get better if I get a new iPhone in future but, for the moment, the iPad works fine. Hope this info helps others who don't wish to make use of a cable to stream their music.
Streaming Qobuz via iPad
I have the Qobuz app on my iPad and I stream to my Marantz streamer into my Bifrost 2 DAC. The thing is the streaming is twitchy or even drops out for a second or two before continuing on. By twitchy I mean I get these hangups in the music accompanied by pops.
what could be causing this? Is this an iPad issue or bandwidth issue? Also, just to confirm, is the iPad just acting as a remote control and the Wi-Fi music signal is coming from the Wi-Fi router? Sorry not really technically proficient in computer.