Dear @Garima Singh
Are you working on the fix for the windows app version? I have the same problem here with the sync, using the windows app version.
Thanks in advance.
I was told that the coming update will resolve the issue so I asked the support when the new update will be released.
The answer was: "...update with the fixes will be available very soon" ....
Hang in there folks...
I had to make a clean install on one of my macs. After that, the sync was not working anymore. So I saved my vault locally and after that, deleted the app and also the data on iCloud. After reinstalling the app from the appstore, I synced again to iCloud and it worked. The windows machine on the other hand still has the sync problem and I cannot find a way to bring it back to work properly.