Game map bug

Hello everyone,

Has anyone encountered the following issue with the H5P core activity in Moodle (the one with the blue icon)? I created a Game Map activity, and everything worked perfectly at first — it functioned well, could be edited, saved without issues, and so on.

However, after some time (unspecified duration), when reopening the same activity and making edits, clicking "Save" results in a blank screen. Moreover, when downloading the H5P file, the content appears to be completely missing.

This issue was first noticed today. Until now, everything had been working smoothly.
Has anyone else experienced this? If so, how are you resolving it?

Here is the view:

It is extremely important as we created lots of content using this activity type and it would be really hard to recreate everything from zero...

Thanks in advance for any insights or suggestions!