I’m having the same issue and it happens more often with CCD on, but it’s even happening to the starter content blue chamfer cubes without CCD. In my project I use a physics constraint to ‘hold’ physics actors, while they are being ‘held’ the collision is set to not react to the player. It runs with no issue whatsoever about %99 of the time but sometimes the physics actor will freeze in place and not move until reacted with again. The objects do this while free-floating in the air, sometimes not even near any other objects. I’m desperate for a solution, and I’m willing to give any info needed to help solve this issue. I’m also using Unreal 5.