SHOWHIDE Macro Sometimes Inserts Rendered Duplicates of Content in Page in Wysiwyg Editor

Affected Version: 2.0.1 (was not selectable in dropdown above)
XWiki Debian 13.10.2 LTS

I happened now twice while trying to insert / edit a SHOWHIDE macro that the macro seemed to have leaked its rendered contents into the page.

I.e. both times suddenly below the SHOWHIDE macro location an additional HTML macro was included below the SHOWHIDE macro which looked like the SHOWHIDE macros header, and the actual macro's contents where repeated below this suddenly appearing HTML macro.

I'm not sure how to reproduce it exactly, but it happened now twice during normal editing. I switched to Wiki Markup editing mode and threw out the extra stuff again, then it looked fine.

In additon, SHOWHIDE does not really play well with the inline Wysiwyg editor - after editing and saving the page, it does not work any more, a full page reload is required.

Is there any better maintained / more modern alternative for SHOWHIDE or any replacement recommendation?