State of charge issue - Dell laptop

[harm_less]

Logged out and in many cases, but not all, I'm having to manually reenter the passwords. I'm running Firefox but between this issue and the battery charge limiting it seems suspiciously like settings have been changed by the W11 install. Is that possible?

Doubt it's windows doing it but stranger things have happened...
is the tickbox below selected in FF settings, would explain it... 

It was ticked and pretty sure I haven't done that purposely recently. Now unticked so hopefully issue resolved. TIA