CircuitPython version

8.1 latest git on equivalent of Adafruit Huzzah ESP32, but really a lilygo/ttgo t-sim7000g.

Observations

I'm just trying this board out and have been seeing this issue regularly while pasting in things to the web Serial Terminal, doesn't matter if using mDNS or IP to access, but comes up with this console error and there is no way to re-enable the websocket. Refreshing once doesn't resolve, but after 3times works (maybe websockets on device are not being closed correctly until another connection arrives and pool gets cleared). Other web workflow pages refresh fine.

The clearest example seems to be pasting in this line to the input box pin = machine.Pin(0, machine.Pin.IN, machine.Pin.PULL_UP) and then going with the cursor (mouse click) to add a 1 after pin, which somes before and sometimes after editing locks up the web terminal with the following error in console:
WebSocket connection to 'ws://192.168.0.39/cp/serial/' failed: Could not decode a text frame as UTF-8.
It seems to just happen a lot on paste, irrespective of what you do afterwards in the input box.