Contact name not displayed on incoming call

On an incoming call, *sometimes* the contact name does not appear and only the number. The contact name appears in the call log after the call was ended though. I opened a new question, as the old questions I could find refer to much older SFOS versions and the old Phone app. This problem also only started for me since upgrading to SFOS 3.2.0.12

Here are some old questions I could find, *possibly* related:
https://together.jolla.com/question/37753/display-contact-number-for-incoming-call/
https://together.jolla.com/question/8887/bug-contact-with-short-phone-number-isnt-recognized-in-call-log-or-messages/
https://together.jolla.com/question/28506/bug-inbound-calls-dont-display-contact-name/
https://together.jolla.com/question/187875/wrong-contact-displayed-on-incomming-call/

I read somewhere of someone with a similar issue since upgrading to 3.2.0.12, but after more than half an hour searching TJC, I gave up...