From the start I had this problem but I thought was because of something I configured wrong but now it is getting really annoying.
A lot of the time android cannot find the login even if the URL is associated correctly. So it lets me look myself through the search function but it cannot find some a lot of my recent logins or logins that are not in my default vaults.
I have to start the app, look manually for the login in the correct vault (when all vaults are selected the search function cannot find them either) and copy paste. I also had this issue on my browser plugins but never on the mac or windows desktop app.
1Password Version: 7.1.3-BETA-1
Extension Version: Not Provided
OS Version: android 9
Sync Type: 1password