3B+ freezing up?

I am using the wired ethernet port. Since moving it to a readfactor of 12 I haven’t had any problems, but I guess I could ease it down some more and see if I get any stuttering video. Unrelated, but I wonder if the ethernet interrupt issue could be contributing to the problem I have with my GPIO IR sensor. It works fine in menus and even with up to 720P video, but at 1080P the remote becomes mostly unresponsive (irw doesn’t even show the codes being received). All the video is streamed from an NFS share on another machine. The GPIO IR was a new project, so I just shelved it for now and went back to my FLIRC, which has been rock solid.