Icon moves from shown to hidden by itself

### Describe the bug

I've got a couple swiftBar (xbar) plugins that create icons in the system bar. I have moved 1 of these icons to the shown section. However, after some period of time I notice that the icon has moved back into the hidden section by itself. Note that this only occurs with my swiftBar plugins. Other icons for "real" apps either say hidden or shown as I set them.

### Expected behaviour

If I hide an icon it should stay hidden

### Environment

You may write here the specifications like the version of the project, operating system, or hardware if applicable.

**Desktop (please complete the following information):**
- OS: Cataling 10.15.7
- SwiftBar version 1.3.0
- hiddenBar version 1.8 (12)