Master password stopped working yesterday

I’ve been using the same  master password for years. It suddenly stopped working on my macbook air (Sonoma 14.6.1) and my iphone yesterday. I pulled out my emergency kit printout, and verified I have been entering it correctly. I also verified that the app is up to date. I restarted my macbook, but that didn’t work.

So, does this indicate I’ve been hacked, or is it a glitch with the system?

What is the best course of action now?

I did create a support ticket, but I’m hoping you all have a quicker answer. Thanks!