Bug report - MC v6.0.0 - export locators fails with filename longer than 27 characters

Looks like this bug is still hanging around in v.6  (was also in 5.0 and 5.5, perhaps earlier.)

When trying to export locators from a clip or sequence having more than 27 characters in the filename, I get the error message:
   "Exception: INVALID_FILE_NAME"

Makes no difference if "General Settings/allow filenames with more than 27 characters" is on or off.

Unlike most exports, I don't get a file save dialogue with the name truncated to 27 characters, just this uninformative error pop-up.