Moving objects delayed

Sometimes moving even a simple object takes 3 or 5 seconds, sometimes 15 to 30 seconds. But not every time. Does not seem to coincide with Autobackup or other Save operations. Might move objects quickly, normally, for an hour and then suddenly a move is delayed. Aggravating and non-productive, several times a day. Any help appreciated. (Corel Draw 2017 / Windows 10 / 16GB RAM)