Thermostat losing connection and not reconnecting, after upgrading to firmware 1.2.8

After “upgrading” firmware to 1.2.8, my thermostat keeps losing wifi connection and will not reconnect unless I cycle the power (which is not very feasible for a remote thermostat). Is there an upcoming firmware fix for this or is there a way to load the previous firmware?

I’m experiencing the same issue, after upgrading the firmware to 1.2.8 the thermostat keeps going offline. It has been working for almost two years without issues. I got it to reconnect by switching off the braker, but it disconnects again after a few hours.