Here’s one example where a call stack is being mangled, in defect report 13932: the traceback includes this line which points to a file doesn’t exist, if copy-paste is used to lcoate the file:
File "C:\Program Files\GrampsAIO64-6.0.3\gramps\gui\plug\report_reportdialog.py", line 760, in report
There should be a backslash between “report” and “_reportdialog.py” but the “\_” sequence is incorrectly converted to “_”.