Result of bracketed function with rank doesnt get bound to variable (or print)

[faeredia]

+⍤1⊢ and (+⍤1) are behaving differently when binding to a variable or printing

This works as expected:

> (april:april "⎕← x← 10 20 +⍤1⊢ 2 2⍴⍳4 ⋄ x")
11 22
13 24
#2A((11 22) (13 24))

This does not:

> (april:april "⎕← x← 10 20 (+⍤1) 2 2⍴⍳4 ⋄ x")
The variable APRIL-WORKSPACE-COMMON::|x| is unbound.

Oddly, with no printing or assignment, it returns the right answer:

> (april:april "10 20 (+⍤1) 2 2⍴⍳4")
#2A((11 22) (13 24))
> ;; This doesn't print
> (april:april "⎕← 10 20 (+⍤1) 2 2⍴⍳4")
#2A((11 22) (13 24))

[phantomics]

This now works.