is this a parser bug though? and if not does the same apply to properties?

It doesn't look like a parser bug (additionally, tree-sitter also considers attribute list to be part of method declaration etc).

It seems to be good news - I utilize it in #2629 (moving from an attribute up to method declaration for example).

It seems to be ready to review for class members.

thanks!

Thank you especially for the hint - it significantly reduced investigating.