Right side not working (sometimes and partially)

[sollted]

I love the keyboard but sometimes right half (slave) stops working, the led is still on but input doesn't work for some time from seconds to minutes it can even stop working completely.
When this happens i disconnect keyboard and reconnect or press the reset button but mostly waiting is enough.
It is extremely irritating. I switched from bluetooth corn keyboard exactly because issues like this one.

For replicating:

• flashing .uf2 to left half (disconnecting then holding BOOTSFL while connecting.
• I am getting firmware from QMK configurator. in safari but tried chrome (it should not have any effect)
• Mac m1 pro this issue persisted throughout all versions of OS
• Czech keyboard layout (if it matters)

Thanks for response in advance.