player_314159265

What ? what version are you on ? Java ? bedrock ? MCPE ? … ?
Does it always do that / has it always been doing that ?
Does it do the same for singleplayer ?

you should probably give the coordinates of those screenshots in the world so they can locate it. Especially if you say you had to walk a lot.
People at mojang probably don’t want to walk through a whole seed finding every location.

Also I assume that this is fake. The 2 or first 3 pictures as probably real, 4 and 8 are real as well, but all the other ones were modified. If they weren’t modified and you are actually scared, well know that either it’s a coincidence (crosses often appear in minecraft, due to world generation, and it’s actually super common in the boulders you find in giant taiga biomes. Same for floating blocks, world generation issues. It’s been doing that since forever, and you shouldn’t be thinking of it as a bad scary thing, but as a floating island base opportunity.)

Also if you are actually trying to put a saddle on a happy ghast and it doesn’t show up but let’s you ride it, THIS is an actual bug, THIS is what you should make a ticket about. Make sure you provide an explanation of how you’re doing it so they can reproduce it later and verify why the bug doesn’t work, as well as linking screenshots (as you did there) of you riding the ghast without a saddle, and trying to put a saddle on it while still not showing it on the happy ghast.

Hope this helps!