Guerau Garrigós

Well, Is that a bug or a feature, because if it was a feature it would be cool.

Maybe it's that when you log out of a game the information of the fall is not saved and/or used when you log back in. So then the game registers it as a fall from that fall level. 

If OpenGL is enabled, then maybe try to disable it and try again. 

I have no idea why this happens, but I would say it's probably your laptop, as similar things have happened to me in Minecraft, but I've always found out that it wasn't a Minecraft problem but with the PC/Laptop.  Try to find the problem with the computer.

This might just be a texture pack issue, not a Minecraft one. Maybe look up the texture pack you're using and see if people have the same bug. 

That is probably because the sky is at a particular distance, and if you set the render distance below the sky you can't see it. BTW I wouldn't play with a render distance of 3 chunks! 

The same account on different computers doesn't have the same worlds & toolbars. It does keep the server ranks but everything else is nowhere to be found. That is one of the issues. I don't know how to transfer it, I just know this

I've had this issue in 1.15 Pre Release 4, HOW TO REPRODUCE: Choose 1.15 Minecraft installation, open world, go/open F3 (coordinates & info).

I tried it out on a superflat world, maybe it works in a normal world.  I just wanted to say that I also experienced it. Hope it gets resolved soon!