1. when scrolling in and out on the full screen map the map will sometimes close.

2. mini-map: if you go in a cave or under any blocks, such as trees, it breaks the mini map. it no longer will show location (x,y,z), mobs, players, or waypoints.

It‘s a known issue, caused by the mod itself.

There are more infos: TeamJM/journeymap#15

I solved this by manually downgrading to the latest release version vs. the beta version (I believe) that ATM is including - be warned that you will lose all of your way points if you do this. I also had issues with my way points showing up in all dimensions (e.g. way points set in the overworld would show up in the mining dimension.)

Will be fixed in next release.