Assuming you have plenty of RAM and spare disk capacity, try resetting the InDesign preferences back to the factory defaults, which may sort the issuse out.
You can do that manually: Launch InDesign and quickly hold down the following keys: Windows: Shift+Ctrl+Alt Mac OS: Shift+Control+Option+Command
When prompted to delete the InDesign Preferences, click Yes (If you don't see the question repeat the exercise.)
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