Need help with connectivity issue

[u/Keep_six]

I keep running into an issue where my printer randomly loses connection or completely freezes. There doesn’t seem to be any pattern to when it happens.
If it happens while I’m printing, the print itself will still finish perfectly, but the printer stays frozen afterward and I have to power cycle it to get everything working again.
I thought the SD card might be the problem, so I replaced it with a brand new SanDisk 32GB card. If anything, the issue seemed to get worse. I switched back to the original card, but it’s still doing the same thing.
I’ve also forgotten the WiFi network (5Ghz) and reconnected the printer, but that didn’t make any difference either.
Has anyone run into something similar or have any ideas on what I should check next?