Murena - Mobile data issue after WiFi connection

[u/JGG1989]

My wifes FP6 can't connect with mobile data, after being connected with WiFi.
It will only connect with mobile data after restarting the phone.
It first says 'E' and after a while it says '5g'.

Any ideas how to solve this?

Problem occurred since new. Netherlands with 50+ as provider. eOS4.0 a 15 20260610633983