I can confirm that this bug occurs without the modification of any files. If this is like my problem, you will find a player data file pertaining to an unused UUID, delete this file and it should reset their player data.
Any mob can climb ladders, although their AI will not recognize it as a suitable method.
I can confirm that this bug occurs without the modification of any files. If this is like my problem, you will find a player data file pertaining to an unused UUID, delete this file and it should reset their player data.