@Chriss Thanks for the reply.
I'm not 100% sure, so please do not nail me down to it. But I think that it is 3.5.0RC2 I had before on it. But I saw that behaviour with the reconnects in 3.4 something already. It never bother me because the printer did always reconnect.
That's ok. So you suspect it was 3.5.0RC2 previously, do you happen to remember also the WiFi firmware version?
My two other printers and my "on my desk test board" are on 3.4.6. And I have found a other printer which I did not upgraded to RC2, it is still 3.5.0rc2 and this one does not have the problem. And this is very much in use at the moment.
In the second sentence, do you mean to say "not upgraded to RC3, it is still 3.5.0rc2" or "not upgraded to RC2, it is still 3.5.0rc1 (or maybe 3.4.x)". Also, can you also confirm the WiFi firmware version of these boards?
Just to be clear here about the status and for unblocking my confusion:
1: RC3 with that problem, with PanelDue and printing (My Voron 2.4)
2: RC3 without problem, without PenalDue and not printing (VCast)
3: RC2 without problem, without PenalDue and printing (V0)
4: 3.4.7 without problem, without PenalDue and not printing (Workbench, VCore, Creality)
Can you also confirm the wifi firmware version for these boards?
You'll notice that I'm constantly asking for the WiFi firmware version, since flashing a certain RRF version does not guarantee a certain WiFi firmware version. That is, you might have upgraded the RRF to 3.5.0rc2 or rc3, but the wifi firmware version can still be on an older version (or the opposite can also be true - you might have new WiFi firmware + old RRF).