I noticed a few weird issues today - One issue is for sure, but both may have been D50 III-related, but not sure.
The first "problem" is when I had it set to the preset with PEQ enabled, and listening with headphones, any time I stopped a track I would hear a tiny little tick/pop sound followed by two more tick/pop sounds back-to-back (so it goes tick .... tick .. tick). Setting it to the preset without PEQ enabled yields no ticks or pops at all when stopping a track. This may have been there the whole time, and I only just noticed now because of the issue below.
The other - more concerning - issue that may not be D50 III-related is: I turned on my L50 and its LED light started flashing after the initial power up sequence. I then turned it off, disconnected the L50 from everything, plugged the power back in, and the LED stayed on as normal. What makes me think it could be D50 III related is that when I reconnected the TRS cables (turning off the HPA first) to the L50 from the D50 III, then powered the L50 back on, the LED started flashing again. After some time, I got it to work again, and as it stands right now, everything seems to be functioning normally, but I'm puzzled by what happened. If anyone has any clue, I would like to know. I did swap out the power adapter I was using just in case that was the culprit, but I'm not sure. Also, it seems that the D50 III doesn't even need the USB power, appears to function just fine with just the USB-C output connection to my Mac M1 Mini. Does one even need to use the Power input if it's connected to a desktop computer?
I also had it happen a few times this past month where I was online with some friends over Zoom, and the sound just completely cut out, and I had to power cycle the D50 III in order to get it working again. The unit felt a little warmer when normally the unit has no noticeable difference in temperature from the room when placing my hand on top (even after several hours of use). It runs shockingly cool compared to the L50 and PA5 II.