& (Or Maybe Something Else) Is Screwing Up My Homebrew Items

I have several dozen hombrew items, spells, and feats. I have been categorizing them by using little parenthetical tags i.e. (Magipunk & Monsters). I have a magic item with hombrew spells added to the description and only some of them are working as intended. I have a very basic understanding of source code and I can't figure out why it isn't working.

I would really appreciate some help figuring this out. I'm hoping to get some help by posting the problem here. I'll add some images that could hopefully help figure out the issue.

You appear to be trying to use tooltip links to homebrew spells and items, which is not possible in general.

I know that I can't do that, but usually when I use it myself it works for some of them. For example, the commlink is also a homebrew item, but that one is visible with the [Tooltip Not Found] tooltip while the others aren't.

Well, your two screenshots appear to be showing them in two different contexts (one where the tags render as tooltips and one where they just render as bold). Those are probably separate code paths that happen to produce different results when given invalid input. I doubt there's much you can do to change that; if you want those to be links, you'll probably have to just manually create and style the links to the homebrew ones instead of using the tags (which will never actually work for that purpose).