@Gulshan Dogra
I think this is affecting all users (I know other Enpass users who all encounter the same issue, all with 1500+ entries in their single vaults) – in my opinion this should be worked on with the highest priority as it really massively affects usability and is straightforward "visible" to anyone..
Even though I paid multiple times for Enpass already (iOS, mac, pro + premium) I also think about switching back to 1Password as this is not only annoying but blocking my workflow and often enough these app freezes lead to a crash of the whole app.
WiFi Sync etc. are nice features but this – adding / editing / searching for passwort-entries – is core-functionality of a password manager.