Weird bluetooth behavior

I had a few days of lots of successful games through lichess. But since yesterday, when I try to make a move in a game, whether online, or against the AI, the board disconnects and reconnects after without accepting the move.

I got the behavior on video, but looks like the upload feature only accepts pictures.
What might be the problem?

https://www.swisstransfer.com/d/835ac4d7-e2bc-4c2e-b0ce-ef963bab2c31

Here is the video!

Are the board and the phone fully charged?
You may try to connect with another device (another phone, a tablet) to see if the problem is in the board or the connecting device. Something near the board is perhaps scrambling the bluetooth.
I have already experienced disconnections, but quickly revolved by moving the phone a few inches.

Thanks for the video - I will send to the app team.

I am not sure what the issue would be with this. Does it happen only after using the board for a while, or does it happen right away on fresh power up?

I think it might be low battery related. But way before the red battery light shows up.
Today I had a few lichess games again, that started to say “invalid move”, which wasn’t true, and the app would stop working, but once I plugged the board in, I could finish the next games.
Luckily I usually have my laptop ready, so I can finish the games there, if the board stops to respond.