When you have sync issues, the workaround in the absence of a Force Sync button (which used to exist) is to create a dummy secure note or to log out and log in again.
Most users won't know this workaround without spending several minutes Googling and digging through search results.
I complained about the lack of a Force Sync button on the clients in the forums, and was told this:
"The reason we don't want too easy an option to force a sync is precisely because folks will choose to use that rather than reaching out to find the root cause"
Needless to say, I wasn't pleased to find out that they wanted to use their paying customers as free testers.
I'd like to switch away, but most of the alternatives I've looked at don't compare very favorably from a UI/UX perspective.