My internet is out (has been for a week, and it’s not looking like it will be back soon). So I switched over to LAN only mode, but it won’t stay connected to Studio! My local WIFI is up and running so no problem there, Studio is on my PC hardwired to the router/WiFi, the X1C is connected to the same wifi router. I ended up deleting all the printers in Studio, then set-up LAN ONLY on the X1C. Then I added the printer in Studio using the IP address (using the same dedicated address I’ve always used) and the access code from the printer. It will connect for a minute and then disconnects. I have been able to print some times by “send to printer” then trying to select the printer in the devices tab. Other times I have to delete the printer and re-add it. Once it’s connected if I’m quick I can send the job to the printer, but it disconnects in a few minutes. The odd thing is the video works all the time!
I have a similar issue on an A1 mini running in LAN-only mode - turning off either the PC or the printer and they forget either ever existed and have to be re-bound.
Both have static IP addresses so it’s not a network issue per-se. It seems require generating a new access code on the printer and using that when re-binding the printer in Studio, the old access code just throws error messages. Seems odd Studio isn’t able to remember bound devices between power cycles.
Both devices have to be either hard-wired to the router or on the same wifi network.
There’s no network port on the A1 mini so physical connection to a route/AP isn’t feasible, but they’re on the same WiFi network 
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Networking is finicky. What does Bambu suggest?