Bugged mini-map / random graphical black squares

Ok so, I was with a party of 3, doing vaal (act2 final boss) and we killed it. The other members went to Cruel mode via Twilight Sand.

I was actually doing vaal runs, so I return to the camp, then reset the warp to water fall cave. I noticed my party members were not joining the re-run, so i kicked them out (they were just randoms).

Well, resetting the instance in waterfall cave, I noticed my mini map was just grayed out (I run mini-map in corner, if that means anything). Press tab, several times, still nothing, even if i explored. I tried turning off minimap corner, nothing. Tried turning it back on, nothing. Even relogged and it was still bugged. I decided to go to a random forest and when I arrived, just random chunks of black squares on the ground.

Problem was fixed by restarting the whole client, but I thought I would mention this bug.