Thank you mark. I've had a look & can replicate the issue which luckily for what's displayed shouldn't be causing grouping merges to occur as can happen due to the bug (e.g. having 2021 & 2022 categories will for that menu be treated as 202 & merges them in the sub-menu that's generated - the actual bookmark files aren't affected & that's ok). This'll need a new full build to resolve this problem.
