itch.io

I had this problem too. It's a purely UI problem. The objectives do still progress and you can see when to move onto the next one because the one you "completed" is erased instead of being checked off. 

So for example, if the objective is to ride a dildo at a slow pace with no depth, then you can do that, let it go for a little bit, and then check the objectives panel to see when it's completed. Once the objective is no longer listed, you can move onto the next one.