Thanks for the reply.
I believe it is a stable build as I received that particular update yesterday before enrolling to the insider program today.
I thought a factory reset would revert me back to the build of Windows that the laptop shipped with? I also asked a Microsoft support agent and he said a reset would fix my issues so I think I will just reset my laptop. Thanks for the suggestion about registry keys - I don't think I really know enough about Windows to be messing with these so a reset will hopefully fix this - if not I will take up your suggestion.
A factory restore is different than "Reset This PC" option in recovery
Do you know what Build was originally installed from the factory when you purchased your PC?
You probably received the preview update if you had this option set on, otherwise it should have asked it if you wanted the preview update as it would be optional.

As for being a stable Build, it may be a matter of opinion. The latest updates just added more bugs. ππππ΅βπ«π€·ββοΈ