Calendars randomly disabled in Merkuro and in Digital Clock plasmoid

I don’t know if this is something that has been already reported. I recently switched from Neon 6.0 to Fedora but I was having the same problem in Neon 6.0.

Sometimes I boot the pc and I find that my Nextcloud calendars have been disabled both in Merkuro Calendar and the Digital Clock plasmoid. I suppose it has something to do with PIM failing to connect to them at boot and automatically disabling them.
Additionally, in the Digital Clock plasmoid my other calendars (Google calendars for various accounts) get disabled.

Any idea?

Found a relevant bug report: 372835 – Korganizer and Digital Clock/Calendar widget keep forgetting of selected Caldav resources