iOS does not always respect custom Autofill behavior

I have a custom domain which my LAN uses, lets pretend its called test.com

I have lots of subdomain.test.com which point to servers, docker containers etc

I have lots of subdomains.test.com which have individual logins, and also have custom Autofill behavior set - which means they should only apply to the specific subdomain.test.com and not *.test.com

This all works great on linux desktop, but on iOS if I go to a.test.com, the grey bar in iOS will usually default to a login which should only apply to b.test.com

1Password iPadOS 8.11.22 

1Password for Linux 8.11.22