RooDial - Issues with upgraded RP Zero W2 and 3.3.3 setup

I have used RooDial for some years without any hickups with a RP Zero W.

I realize that RooDial has been an upgraded to 3.x and purchased a RP Zero W2 to perform the upgrade.

I revoked the licence on the old setup and “etched” v3.3.3 on a new SD.

After SD is installed in the new RP Zero W2 it seems to start up as it should, I can configure it to the WLan and it is visible in ROON extentions.

But I expect strange behaviours. Main challenge right now is that it dissapears from extentions after a minute or so.

Questions:
1: In the instructions it states that there should be a red led on the board. Is this the case? I have not seen any red led and have just waited until the green led is off before restart of RP.

RooInstruction

2: How should the W2 board indicate when up and running? Mine keeps blinking green when it is visible in extentions. And after a minute or so, the led starts to blink faster (green) and then dissapears from Roon extentions.
After additional 30 sek or so the led is fully on (green), but keeps to be invisible in extentions.

A reset of the RP just repeats above.

I have re-etched 3.3.3 several times on different SDs, and changed USB power feed. Same behaviour. I suspect a faulty RP board. Or could it be something else?

I have returned to my old 2.3.2 setup with the RP Zero W. Works perfectly.

Please advise, TiA.