Application.Evaluate("<<positive number>>") throws application defined error

Question

So in one of my projects I have an evaluator callback which offers me lambda-like syntax for dealing with arrays:

fMitPCInt = Mitigations.Filter(cbEqn, Eqn("$_::isInternal")).Map(cbMit, Eqn("$_.GetEFI(""" & sSeverityInt & """)"))

This essentially generates a callback which calls Application.Evaluate (innefficient I know but it's a nice syntax sugar).

Long and short of it is in Excel365 Application.Evaluate("1") throws an error. From testing I found the following:

Application.Evaluate("3")   'throws error
Application.Evaluate("2")   'throws error
Application.Evaluate("1")   'throws error
Application.Evaluate("0")   'works
Application.Evaluate("-1")  'works
Application.Evaluate("-2")  'works
Application.Evaluate("-3")  'works
Application.Evaluate("1+0") 'works

So essentially, Application.Evaluate just doesn't work for positive numbers in Excel365.

How can we get around this problem?