Do you happen to use CAS authentication? If so, this topic below will be helpful, if not the answer.
Even if you don’t use CAS, it may be worth looking though this anyhow for information about how these apps use the passwords they’re given. It may give you ideas on how to troubleshoot, what files to look for, html elements to inspect, what API calls in your browser to look at and so on.
Let me know if that’s helpful!