Sorry strange language, but I’m sure you understand:
This is normal situation:
- category navbar shows categories
- topics show category before tags
With your plugin happens this:
- category navbar disappear
- topics are showing only tags
Cat navbar is just a secondary issue from something that affect categories. Its status doesn’t play any role.
The most of categories are typical everyone and some are for TL0.
There is chance this is just another conflict between other component/s or plugin/s. I can check that at some time, if you don’t see anything strange on your instance.