BX310x Guru meditation error

We have a really big problem right now using the BX3105 in Version 2.5.0-2 (the newest that was available in AirVantage).
The controller runs for like 40 minutes and then we get a Guru Meditation error. We once activated FOTA to upgrade the WiFi chip. Since then we do not activate or deactivate it, but it looks like it stays active.
Therefore you see the +WDSI prints we get. But sometimes we get the Guru Meditation Error after it.
Another change we had before is the activation of RTS on our system. Prior to it we did not set RTS and sometimes lost data.

17:11:51.712 +WDSI: 8
17:25:51.446 +WDSI: 4
17:25:51.801 +WDSI: 6
17:25:51.803 +WDSI: 23,1
17:26:52.310 +WDSI: 8
17:40:51.441 +WDSI: 4
17:40:51.893 +WDSI: 6
17:40:51.894 +WDSI: 23,1
17:41:52.385 +WDSI: 8
17:41:52.390 NO RSP: Guru Meditation Error: Core 1 panic’ed (Unhandled debug exception)
17:41:52.393 NO RSP: Debug exception reason: Stack canary watchpoint triggered (IDLE1)
17:41:52.395 NO RSP: Core 1 register dump:
17:41:52.399 NO RSP: PC : 0x40090652 PS : 0x00050036 A0 : 0x40091f67 A1 : 0x3ffbbab0
17:41:52.402 NO RSP: A2 : 0x00050023 A3 : 0x00000000 A4 : 0x0000029b A5 : 0x3ffbe940
17:41:52.406 NO RSP: A6 : 0x00000001 A7 : 0x3ffbab7c A8 : 0x40081fa5 A9 : 0x00000005
17:41:52.409 NO RSP: A10 : 0x00000aaa A11 : 0x3ffbbc60 A12 : 0x8009170e A13 : 0x3ffbe930
17:41:52.413 NO RSP: A14 : 0x3ffbe978 A15 : 0x00000001 SAR : 0x0000001e EXCCAUSE: 0x00000001
17:41:52.417 NO RSP: EXCVADDR: 0x00000000 LBEG : 0x00000000 LEND : 0x00000000 LCOUNT : 0x00000000
17:41:52.420 NO RSP: Backtrace: 0x40090652:0x3ffbbab0 0x40091f64:0x3ffbbae0 0x40091f1a:0xa5a5a5a5
17:41:52.422 NO RSP: Rebooting…

I hope someone did excperience this and might be able to help us, because we do not know what happens there.

We have an own TLS/MQTT application running which uses only the socket function of the BX3105.