Change the value of either JumpMaxCount or JumpMaxHoldTime for a character on the server.
Expected: The values on the client will update to reflect those on the server.
Actual: These values are marked as DISABLE_REPLICATED_PROPERTY in ACharacter::GetLifetimeReplicatedProps, so changes made to them on the server will not replicate to clients.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-113529 in the post.