I tried both the SYS: Restart gateway control in HA, as well as power off/on by taking the power cable out of the board, but sadly still nothing in that topic 
This one: esp32-olimex-gtw-ble-wifi → I could try esp32-olimex-gtw-ble-eth instead maybe?
Flashed via: (Option 1) Upload from the web | OpenMQTTGateway v1.7.0 → should I try the ESP tool instead maybe?