Hello betel. thanks for contacting us about this. Is the the only map that was affected by this?
For anything to do with textures loading incorrectly we first as players to verify their game files as this often solves this type of problem with the maps, as it corrects the game files and replaces any bad ones.
Here are some instructions on how to do this in Ubisoft Connect -
https://support.ubisoft.com/en-gb/Article/000060529
Here are some instructions on how to do this in Steam -
https://support.steampowered.com/kb_...2037-QEUH-3335
Please let us know how you get on after trying this step? Thanks betel.