Now, there's another issue that I noticed only after further testing. I have a bilingual site (En/Fr).
I set up two events for En and their counterparts in Fr. The issue is that I can only see one event in the English calendar and no events in the French version of the calendar.
I am pretty sure it's due to the polylang plugin. Once I disable it, all the events do display in the calendar.
Could you guys please point me what could be causing this behaviour?
Thanks in advance!