fn-Or(fn-IsMemberOfGroup(Group1), fn-IsMemberOfGroup(Group2)) is not working

[#1]

I would like to add more than one group to the fn-IsMemberofGroup() expression, but it isn't working.  It does work with one group.

[jwiskema]

I am trying to do the same thing and it also isn't working:

fn-Or(fn-DoesMemberExistInAudience(Current User, 'Group1'), fn-DoesMemberExistInAudience(Current User), 'Group2')) 

Thank you,

Jennifer