Hello and sorry about the issue!
There are some bugs I didn't quite catch during the last update and this was one of them.
The fix is to unsubscribe from all workshop entries and then on the main menu switching to no workshop should reset the maps to start loading correctly. Once you've done that you should be able to resubscribe to a number of Endless maps and they should load different variants.
Alternatively you can subscribe to some Bronze-only maps on the workshop to see if they cycle any. If there is no change then the above steps should work to fix the problem.
Once again sorry for the issue but hopefully we are able to get to a solution for you soon!