I had a text object that included some actions. I copied the object three times and made minor changes to the actions. On the 3rd copy it no longer left me save my changes.
I tried the normal SOCC (sign out clear cache) and that didn't seem to work.
I simply added a new text box and created exactly the same actions with success.
Fortunately.... There is no wheel to wait on and creating actions is a breeze in method new compared to classic!