Doesn't surprise me. We had a few Dell AIO's in our office and whenever the CPU was under high usage for more than 15 minutes the motherboard would start malfunctioning. USB ports would stop working, built-in screen would flicker or short out entirely, etc. As soon as the CPU usage let up, all the issues went away and it would work normally again even without a reboot. Same behavior, multiple identical models in our office doing the same thing. Clearly a design defect/flaw.
Dell's solution? Replace almost every part under warranty under numerous repairs. As expected, issue still persisted and support had no explanation. We had no luck trying to escalate the issue as a design flaw. We decided to cut our losses and just order new PCs that weren't AIO's since they wouldn't be thermally pushing the limits.
Dell's solution? Replace almost every part under warranty under numerous repairs. As expected, issue still persisted and support had no explanation. We had no luck trying to escalate the issue as a design flaw. We decided to cut our losses and just order new PCs that weren't AIO's since they wouldn't be thermally pushing the limits.