I also started having this issue. First on my android, where i noticed it was not as bad if i diabled my wifi, thinking it had something to do with sync. yesterday my laptop (debian linux) started going really slow as well. i saw this thread about the db size and I looked:
on Sept 5, my db went from 13M to 245M
-rw-r--r-- 1 dab dab 13M Aug 25 08:52 2022-08-25-1661431923-1_vault-1460_items-auto.enpassbackup
-rw-r--r-- 1 dab dab 13M Aug 26 16:04 2022-08-26-1661544254-1_vault-1460_items-auto.enpassbackup
-rw-r--r-- 1 dab dab 13M Aug 28 16:29 2022-08-28-1661718568-1_vault-1455_items-auto.enpassbackup
-rw-r--r-- 1 dab dab 13M Aug 30 09:41 2022-08-30-1661866906-1_vault-1455_items-auto.enpassbackup
-rw-r--r-- 1 dab dab 13M Aug 31 19:38 2022-08-31-1661989102-1_vault-1455_items-auto.enpassbackup
-rw-r--r-- 1 dab dab 13M Sep 2 09:48 2022-09-02-1662126497-1_vault-1455_items-auto.enpassbackup
-rw-r--r-- 1 dab dab 245M Sep 5 23:04 2022-09-05-1662433424-1_vault-1454_items-auto.enpassbackup
-rw-r--r-- 1 dab dab 245M Sep 6 10:10 2022-09-06-1662473384-1_vault-1451_items-auto.enpassbackup
I tried to create a backup, as it was the only option i could find, but it created the same size. i tried looking for large objects, but the app has become too slow to navigate at all. is there any way i can export everything and reimport? this is really going to block me from getting any work done at all until it's fixed.