How to reproduce...
Admin > Forum > Calendar > Settings > check "Show linked events in topic display"
Admin > Forum > Calendar > Settings > select "on board index and calendar" for "Show events"
Calendar > Post Event
See attachments for the expected behavior.
Now for the bug... edit the event by changing the date. After editing the date...
1. the "Linked Events" section disappears from the topic page
2. the link to the event on the board index "upcoming events" is missing, only text.
hmm... can you check in the error log if there is anything after you edit the event?
nothing in the error log
I don't think this one is tracked yet for 1.1.6.
Yep, it would be nice to have a way to reproduce it before.
I tracked it as unconfirmed :: https://github.com/elkarte/Elkarte/issues/3299