Hiking trails continuing disappearing by zooming in/out

[mattia-b89]

I noticed an issue:
hiking trails casually appear/disappear based on zoom level.
In a few words, when I enable "hiking trail", nothing is shown; zooming in/out, trails appear/disappear completely/partially.

I attach a screencast, showing the behaviour:

screencast.mp4

[mattia-b89]

a little update: it looks like a server/connection problem on the source side;
I have visited official waymarked trails site and they didn't have any trail at all but show an error message:

this can the the source of the problem, and:
a good news, since gpx.studio is OK but we should handle this/any kind of error in any way
e.g. showing an error message, easy!

[mattia-b89]

last update: I confirm, issue has gone as soon as trails source has been fixed;

I do not close the issue, I let it as placeholder for (as mentioned above)
having a "debug" message that can handle this kind of problem.