Consistently losing credentials on Argon

Firmware Device OS
21

Hi Everybody
I haven't had any luck with any of the suggestions, but so far, here is what I've identified so far:

  1. The devices that are having credentials issues are always devices that use both Ethernet and Wifi. Wifi for internet acces and Ethernet for Modbus. We have fewer units (about 8 if I remember correctly) that use Ethernet for internet access, and we leave unused Wifi (although we have configured always a support network that we use with mobile hotspots).
  2. Where we have ethernet internet access, we are somehow loosing wifi acces (no credentials) and we are having key synchronization issues.
  3. I recently installed the O.S 6.2.1 on 3 Argons that weren't neither connecting to our hotspot nor customers hotspot (both already configured), and 2 out of 3 connected to the Wifi after the update (one of them later showed key synchronization issues, but connected). The remaining one did not connect.

So in summary, we strongly believe that there are O.S issues related to the combined use of Ethernet and WiFi that are not clear!
Any inputs will be greatly appreciated.

Best regards!