So do not know if it's just me or the after effects this bagudo 2015 ... Projects heavier when I change something in the timeline it does not change the preview ... Even cleaning the Purge he continues buggy was the only solution I found was to close and open the project again, only after a while he returns the bug
Go back to using AE CC 2014. AE CC 2015 has many problems because Adobe is doing a long-overdue re-write of big sections of the application. Undoing is one of those problems, among others.
The problem with the preview image failing to update after Undo was a bug introduced in the 13.6 update for After Effects CC 2015 and fixed in the 13.6.1 bug-fix patch.
Thanks...I will takes the tests