Conflict with Gutenberg reusable blocks

Gutenberg – the default editor? Or you are using a plugin?
Open please the developer console. Are there any errors?

No, I‘m using the default block editor (WordPress Version 5.8.1).
I‘m currently not able to view the developer console as I‘m working remotely only with my iPad.

Is a shortcode from the plugin used in the reusable blocks?
iPad – Safari Browser?

Okay, we‘re getting closer: In one of my reusable blocks I do use the elevation shortcode. As I am using this reusable block as a template for my standard tour blog post the gpx argument is empty [elevation gpx=““]. Obviously the main bug in the plugin, how it handles this empty argument. As soon as it is empty, I save the post and try to reopen it for edit, I get the following error ?No gpx track!“. If I fill the argument in my reusable block, they reappear in the editor.
Hope this helps.

I need to provide a setting where the user can choose whether or not to interpret the shortcode in the backend. At first I had implemented it so that it is not interpreted in the backend. But there were problems with Elementor …
There are so many possibilities.

I found another solution.

I will not make it today to finally publish the new version.
Until then define gpx="any placeholder" and not gpx="" in the reusable blocks.

Yes I‘ve already done that during yesterday’s testing.
Thanks again for another quick support.