Unable to use SIM - "SIM not provisioned" [3.4.0.22]

REPRODUCIBILITY (% or how often): 100%
BUILD ID: 3.4.0.22
HARDWARE (Jolla1, Tablet, XA2,…): Xperia 10
UI LANGUAGE: English
REGRESSION: (compared to previous public release: Yes, No, ?): Yes

DESCRIPTION:

One of my SIM cards are no longer usable after upgrade to 3.4.0.22. I get an error message stating “SIM not provisioned”.

PRECONDITIONS:

STEPS TO REPRODUCE:

  1. Upgrade to 3.4.0.22
  2. Receive an SMS(?)

EXPECTED RESULT:

Being able to use the SIM card as previously

ACTUAL RESULT:

SIM card being unusable. Symbol in top corner is grey and state under “Cellular network” in Settings is either “Searching” or “Not connected”.

ADDITIONAL INFORMATION:

Originally I had the SIM card in secondary slot and didn’t think of it not working since I don’t use it that often. Today I received an SMS on that subscription (so it did work for some time) but when I was sending my reply I got the error message and then it didn’t work any more. I’ve rebooted the phone several times as well as moving the SIM card to primary slot and removing the other SIM card, to no avail. I still get the error message every time now.

I have verified the functionality of the other SIM card and it works as expected.

I have an exchange account, but have not enabled provisioning on it, neither now nor before upgrade.