I went thru basically this same scenario a few months ago. Router would say the X1C was connected. X1C would show it was connected, but it still couldn’t get to the internet. I really suspect it was a firmware issue, an update had just been released. And yes, I have separated networks, different SSIDs. After much round and round with Bambu, they finally replaced the CPU/wifi board . Problem fixed. Still don’t know if it was hw or sw, though. Saga goes on… Printer started complaining about the lidar not working. This time, Bambu came through immediately. New lidar, cables, adapter board. PITA to replace, but finally my X1C is back to It Just Works mode. BTW, rev levels on the boards changed. While that doesn’t always mean a design change, maybe just a different component vendor, different footprint. But, maybe there were hw issues that got fixed.
It’s times like this that you really wish it had an ethernet connection.
If you’re on any Netgear router, like a Nighthawk, Orbi, etc, UNchecking the “Enabled 20/40 MHz Coexistence” box worked for me.
