After TWP, The Cave

I’m wondering if this is a better place to continue my commentary on The Cave. I don’t want to annoy anyone trying to read/post about other games they’ve bought in the other thread.

Anyway, I’m still stuck on the Time Traveller level and starting to think it’s down to the bug Nor mentioned.

I’m trying to move a rock so that oil will fill a hole. But when I go to the next time period chronologically, it’s still in the same place. Whichever way I push it, it reverts back.

Thoughts? Is it bug related or am I just thick as a plank?