Created attachment 123837 [details]
Video showing the buggy behavior

SUMMARY
My calendars are synced through opwncloud. I configured the digital clock plasmoid to show them in the calendar popup.
When there are events in the present day, they are not listed on the popup calendar, until I click to a different day, then click again on the present day.

STEPS TO REPRODUCE
1. Configure the digital clock to show PIM events.
2. Create an event on the present day with korganizer
3. Restart plasma shell with plasmashell --replace
4. Click on the digital clock to open the calendar popup

OBSERVED RESULT
You'll the the mark on today indicating that there's and event, but you won't see that event listed on the left side of the popup.
Click to another day, then click again to the present day and the event will be listed.

EXPECTED RESULT
Today's events should be listed as soon as you open the calendar popup

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 19.10
KDE Plasma Version: 5.17.2
KDE Frameworks Version: 5.62.0
Qt Version: 5.12.4
Kernel Version: 5.3.0-19-generic
OS Type: 64-bit
Processors: 2 × Intel® Core™2 Duo CPU P8600 @ 2.40GHz
Memory: 3,7 GiB

ADDITIONAL INFORMATION
Attached screen capture