Video doorbell pro blue light blinking upward

My RVD was working fine for a few monthes now. I tried to connect it to a new chimes pro to improve wifi reception. It has restarted, and now it always blink in blue in the half top led, with no possibility to switch to setup mode (orange right button does nothing). Hard reset only restart it in this blue blinking mode. Voltage is still the fine 24V which always worked. For these tests my wifi router is 20cm from the doorbell. What can be done to unlock this situation ?