CNC 3018 with Bluetooth HC-05

My CNC 3018 came with WOODPECKER 3.2 GRBL control board “broken“ strange way: after successful run ~20-30 min it loses connect via miniUSB cable (CH340G on board glitches). So I connected Bluetooth HC-05 module directly to UART of onboard ATMega328P. Seems it run ok now. I already see a ~1hr of successful run! :-) But GRBL Candle program stops animation after some time (~8 min), but I can see it sends G-code commands one-by-one. Still running ok ;-)