This is not normal behavior. You did not say if it is happening with multiple fonts or just one. At any rate since InDesign should not be doing this I would suggest rebuilding your preferences just to make sure that this is happening even when the program is at its factory settings.
To reset preferences:
For Macintosh Users: With InDesign closed Launch a Finder Window in column view and click on your home folder. With the Option Key pressed choose Library from the Finder Go Menu. Within the Library folder find the folder called Preferences and within it find the following two files and delete them: “Adobe InDesign” and “com.adobe.InDesign.plist”. When InDesign is next launched it will create new preference files and the program will be restored to its defaults.
After you’ve reset up the program (make sure that no document window is open) to your liking, it is a really good idea to create copies of your personalized “mint” preference files (make sure that you quit the program before copying them—that finalizes your customization) and use them in the future to replace any corrupt versions you may need to delete.
For Windows Users: Hold down Ctrl + Alt + Shift when launching InDesign and respond affirmatively when asked if you want to reset.
By the way the thread you mentioned is for Illustrator. Even if they had come to a solution it may not have helped the problem in InDesign.
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