Inconsistency tags/tags ->category

I see a confusing inconsistency between tag and tags pages when selecting a category. If I’m at a tag page e.g.:
and I select a category e.g. bug I’m taken to a list for topics only in the bugs category with the tag pr-welcome, which makes sense to me:

But, then if I again change the category from the category drop e.g. to feature this time I’ll lose the tag that was selected at first and be taken to the category only page:

That was quite confusing to me - at some point the filter is kept and then lost. It would be much better to align them.