Sync issues
Occationally, the Henosia client can drift out of sync with the Henosia server. If this happens, there are two things you can try:
Reload Project
At the top of the view area, try clicking the reload button to see if it fixes the problem.

Restart Project on Server
In the menu at the top left, try selecting "Restart Project on Server". This is a "bigger hammer" but it can fix quite a few of the sync issues.

Apart from the few actions you may have taken while the sync issue persisted, you will not lose anything in your project by doing either of these fixes.