Hello. After additional testing, my post (Librem Mini , USB issues behind hub), I was able to determine the USB issues were limited to only USB 2.0 devices. USB 3.0 devices were not affected. I was issued an RMA and all issues were “fixed” upon receiving my mini back (apparently, a motherboard replacement).
Interestingly, just this week (actually!), I’ve been again noticing similar symptoms with USB. I’ll hold details until I’ve finished testing… would be a separate thread anyways.