Ever since upgrading to the December 2015 version of AE CC, I am having a very frustrating issue.....
After making any modification to a layer (adding an effect or preset, transform...anything) I am finding I have to purge the memory to get it to show up correctly.
It's really obvious if, say, I add a text animation preset.... The preset will work just fine. But if I decide I don't like it and do an Undo, the timeline will show everything is gone.... but the preset STILL shows when using the player. I have to go into Purge Memory to get it to clear and show it to me correctly.
Is this a bug or is there a setting I need to turn on or off? This never happened before the December update. It seems to happen most when using UNDO
You are describing a problem that is resolved in the After Effects 13.6.1 update that we are releasing later today.
The After Effects CC 2015 (13.6.1) bug-fix update is available. It fixes several bugs, including the one being discussed on this thread.
Let us know how things work after you have installed the update.