Disabling 1P on certain websites

I switched to 1P from LastPass a few weeks ago and something that's been driving me up the wall is I can't figure out how to disable autofill/prompting on certain websites.

A great example is I use a virtual table top called Foundry via an online hosting solution called https://forge-vtt.com/.

For whatever reason, when I load Foundry the 1P extension randomly offers to fill in my contact info in fields like the title of a journal page. I managed to get a "hide on this page" dialog in a right click menu but it does nothing. 

Please help!

Chrome
Windows 11