Tested environments

• the beta version pass for iOS 0.12.0 (8) from testflight on iOS 14.4 (has this issue)
• the stable version pass for iOS 0.11.0 (11) from App Store on iOS 14.4 (has this issue)
• iOS 11.4 running Pass for iOS 0.9.0 (21) (works without this issue)

Steps to reproduce:

1. Set up a remote https git repo at gitlab via username and password (id_rsa 4096 key and id_ed25519 keys don't seem to be supported... but that is irrelevant to this).
2. Also exported the gpg keys via local server URL (using ruby -run -e httpd . -p 8080 and then http://<local ip>:8080/a.asc etc.). The import seemed fine, except it warned me not to use http but use https instead.
3. Then I clicked on one pass item in the Passwords menu. It asked for the PGP secret key Passphrase.
4. I filled in the password correctly (I tried 20+ times, even via a bluetooth keyboard); the same password unlocks my gpg on my computer fine).

Result

However, once I finish inserting my password and click OK, I get:

Cannot show password
gopengp: unable to add locked key to a keyring

Expected results:

The item opens, and shows the item view, where I could copy or show the password.

Things I have tried to fix/rule out:

• Guessing it may have been talking about iOS keychain, I checked my keychain. It is synced fine with iCloud, and works fine.
• Tried several times after deleting the GPG key and several ways to export the gpg key (via key id, or the email etc.).
• Also tried importing via iTunes (dropped the keys into the Pass Beta app then clicked iTunes import which showed a prompt saying "success").
• Tried deleting the app (along with its data) and completely setting up afresh.

None of those worked. Not sure what went wrong here.

Let me know what more info I can provide to help debug or resolve this issue with better documentation.

Not sure if it is relevant, but I was using an old iOS 11.4 running Pass for iOS 0.9.0 (21) before which worked (and still works) fine; I just migrated (via backing up to iTunes, ehm, it is called Music now and works directly from within Finder) from that to iOS 14.4.