Generally it should be fine. Recently we've experienced some sync issues (should be resolved by now), I wonder if your situation has anything to do with it.
Let's say you want to sync changes from tab A to tab B. I know that you refreshed tab B, and when was the last time you refresh tab A?
Another minor thing is that changes don't get synced as you type every little stroke. At least 5 seconds need to pass before it syncs again, unless you manually sync with
Ctrl+S. Make sure you see the "Synced" status at the top right corner of the app in tab A before expecting seeing it in tab B.
I hope that helps!