Prusa WiFi failed mid-print on MK4
We had the printer printing, it was in the first 10% of the print, and we tried to upload a file to the printer (local web interface, not through connect). We weren't watching the upload but somewhere during the upload the WiFi stopped responding and has not come back in several hours. Note that the print did not fail or even appear to slow down.
I plugged in an ethernet cable and the web interface on that port worked just fine over Ethernet. After a short time the WiFi interface again started working, so plugging in the Ethernet cable cleared whatever the problem was on the WiFi. My guess is that the printer restarts the network stack when the network changes, and this caused things to go back to normal.
If this happens again, I'll try the same fix.
RE: Prusa WiFi failed mid-print on MK4
Well, it happened again today and nobody tried to upload a file during the print. The dashboard was working (and was used to start the print) but failed at some point after before the print was at 10%. Plugging in the Ethernet worked to bring it back to life again. The printer has been off between the last failure and this one, so it was not a temporary state problem. Unfortunately I have to run a cable across the room to plug in the Ethernet so I need to use the printer over WiFi mostly. I'm going to be moving the printer soon, maybe I'll just give up on WiFi and rig Ethernet in the new location.
RE: Prusa WiFi failed mid-print on MK4
I would speak to support.