@flcdrg Welcome to the forum!
The “inline auto-fill menu” feature (dropdown menu displayed inside username/password fields on a website) works by injecting code into the webpage. This sometimes/often causes problems with the functioning of the website, which is why Bitwarden was reluctant to implement such a feature. Nonetheless, there was persistent user demand for inline auto-fill menus to be implemented, so this feature was finally added in December 2023. And here we are.
My suggestion is to go to Settings > Auto-fill, and set the “Show Auto-Fill menu on Form Fields” option to “Off”. Then you should be able to do auto-fill as before, using Ctrl/Cmd+Shift+L.
Instead of posting such issues here, please use Bitwarden’s official form for reporting autofill failures: