They might have got somewhat of a bad rep for their cathode-bias amps of 20+ years ago. That would be the 88 and M120 models. These amps threw out a whole lot more heat, which can cause problems.
Their current tube amp models are manually biased via trimpots & built-in meter, and these have proven quite reliable. With any tube amp, there’s no 100% perfect fail-safe for a sudden catastrophic tube short. I had this happen with an Electro Harmonix KT90 in my Rogue Apollo monoblocks, circa 2010. It dusted a metal oxide resistor and singed ~ 1cm of circuit board trace. Trace was still working but the solder mask got burned off so Rogue replaced the whole board under warranty. So yes, a bad tube can cause collateral damage that requires service. I switched to KT120 tubes after that incident, and they’ve been exceptionally reliable. Never had another problem in the next 12 years of Apollo ownership.
Tube amps with advanced auto-bias & protection circuitry might have a slightly lower risk, and P2P wired amps have no PCB board to damage. Never had the slightest issue with my VAC auto-bias tube amps so far, though I’m only 4 years in with these amps.
In your case, I would definitely send the Atlas in. Bit of a bummer, but better to get this sorted now. It's a great little amp, and Rogue customer support is fantastic.