harg
That will be the case for a lot of paths at the moment, if they cross fields that are not mown regularly. Grass which has been just "long" (eg 12 inches) in previous seasons can be up to about 4 feet in some places. If the path is completely impassable at the moment it could be retagged  it disused:highway and wait to see whether it gets mown later, in which case it can be reverted to highway.