Wall of Force discusses what happens when it goes through a creature’s space:
If the wall cuts through a creature’s space when it appears, the
creature is pushed to one side of the wall (your choice which side).
…and I assume similar logic can be applied to small/medium sized objects such as chairs that can be moved.
But what about objects that are not a creature, or a single creature, and aren’t particularly mobile?
a) An enemy is hanging from a rope. Mage casts a horizontal Wall of Force that “cuts” through the rope.
b) A Chain Devil has grappled the fighter from 10′ away with its Chain attack that has 10′ reach. Mage casts Wall of Force between them as part of a hemisphere, hoping to cut the chain and trap the devil.
If the object was a stone wall, I think most would agree that the stone wall stops the Wall of Force as the panels wouldn’t be contiguous or the sphere wouldn’t be able to expand in a direct line from its point of origin.
Does something as thing as a rope or chain have a similar effect?
Could the area of a Wall of Force be greatly reduced just by having streamers hanging from the ceiling, or standing in a forest with a bunch of tall trees?