Good afternoon
Thank you for bringing those to my attention , i can understand your frustration and i believe you're new to being a server owner otherwise you would have been aware of the impact December update had and has to custom maps where it requires all map creators to redo their maps with the new cliffs/hills and some other changes so unfortunately if you were unaware of those changes there's nothing i can say more.
For the future please inform yourself regarding changes being brought by the updates monthly and it is always recommended for first week to use a Procedural Map if there are map changes to the update since alot of things can happen or need to be debugged depending on the update.
Thank you in advance for your understanding and once again i understand your frustration!