FileMaker Pro Advanced 126.96.36.199
If pasting something like:
~n = 1
directly into the Inspector 'Hide object when' without opening the calculation window it returns:
Any hard returns and subsequent entries are not retained.
The workaround is to always open the calculation window before pasting and do not paste directly into the Inspector if running FileMaker on Windows.
This does not appear to be a problem on the Mac version.