Fatal Glitch when entering vehicles online

Hey, since last week I discovered a weird glitch when entering vehicles in matchmaking.
As I only played H3 lists, I can’t tell if its also for the other games.

When I try to enter a vehicle, I still stand next to it instead of sitting in it.
The weird thing is, when I move, the vehicle moves as well, like I am actually driving it.
So I see the vehicle moving, while I am walking and it has same speed etc.
This glitch makes it impossible to play properly and it also happens sometimes with other Players I see in the game.

How can I fix this?

Please help!

Thanks and kind regards,