App keeps asking for Keychain Access
So I have this app from a vendor, and it requires Keychain access. I'm assuming that's because the app will reconfigure or manage networks. So I added the app as a trusted app with "full control". I then also went into Keychain and "unlocked" the keychain... which in my understanding means while unlocked (for 5 minutes) I should not get any keychain access attempted messages? The vendor is not supporting their app, and it's super complicated, not wanting to make any trouble. It was painful on Big sur and is painful on Monterey too, so it's not really a Monterey and not an M1 related issue.
What have I miss-understood when I unlock the keychain and still get keychain access prompts (4 in a row) and asking me for system credentials prompts directly after unlocking (for 5 minutes.) What does the 5 minutes "unlock" really mean? Assume I know nothing about the operating system security. Yes I set this mac-mini up and installed it all myself, it's not on a domain and has no special security, and am tempted to use up a day re-installing the OS, but want to know why "unlock" is not really doing what I expect it to.
Mac mini 2018 or later