Here is one.
I ask it to write some code. 4-5 pages long. With some back & forth it does. Then I ask "change lines 50-65 from blue to red", and it does (change#1). I ask it to show me the full code. Then I ask "change lines 100-120 from yellow to green". Aaaaand it makes the change#2 and revokes the change#1. Oh!! the amount of times this has happened.. So now I ask it to make a change, I do it by 'paragraph' and I copy & paste the new paragraph. It's annoying, but still makes things faster.