Placeholders break function calls in interactions window

With these BSL definitions:

(define (f x)
  ...)

(define (g x)
  x)

entering either (g 5) or (f 5) in the interactions pane results in a nasty ambiguous binding error for #%app:

#%app: identifier's binding is ambiguous
  context...:
   #(-967113051640681897 module) #(-967113051640681896 module teach 0)
   #(-967113051640681890 use-site) #(44611 module) #(44612 module #%htdp 0)
   #(44615 macro) #(50001 module) #(50002 module #%htdp 0) #(55328 module)
   #(55329 module #%htdp 0) #(60669 module) #(60670 module #%htdp 0)
   #(66014 module) #(66015 module #%htdp 0) #(69516 macro)
  matching binding...:
   #<module-path-index:((lib "lang/htdp-beginner.ss"))>
   #(44611 module) #(44612 module #%htdp 0) #(50001 module)
   #(50002 module #%htdp 0) #(55328 module) #(55329 module #%htdp 0)
  matching binding...:
   #<module-path-index:((lib "lang/htdp-beginner.ss"))>
   #(44611 module) #(44612 module #%htdp 0) #(50001 module)
   #(50002 module #%htdp 0)
  matching binding...:
   #<module-path-index:(mzscheme)>
   #(-967113051640681897 module) #(-967113051640681896 module teach 0)
  matching binding...:
   #<module-path-index:((lib "lang/htdp-beginner.ss"))>
   #(44611 module) #(44612 module #%htdp 0)
  matching binding...:
   #<module-path-index:((lib "lang/htdp-beginner.ss"))>
   #(44611 module) #(44612 module #%htdp 0) #(50001 module)
   #(50002 module #%htdp 0) #(55328 module) #(55329 module #%htdp 0)
   #(60669 module) #(60670 module #%htdp 0)
  matching binding...:
   #<module-path-index:((lib "lang/htdp-beginner.ss"))>
   #(44611 module) #(44612 module #%htdp 0) #(50001 module)
   #(50002 module #%htdp 0) #(55328 module) #(55329 module #%htdp 0)
   #(60669 module) #(60670 module #%htdp 0) #(66014 module)
   #(66015 module #%htdp 0)
  context at layer 1...:
   #(-967113051640681897 module) #(-967113051640681896 module teach 0)
   #(-967113051640681890 use-site) #(44611 module) #(44612 module #%htdp 0)
   #(44615 macro) #(50001 module) #(50002 module #%htdp 0) #(55328 module)
   #(60669 module) #(66014 module) #(69516 macro)
  matching binding at layer 1...:
   #<module-path-index:((lib "lang/htdp-beginner.ss"))>
   #(44611 module) #(44612 module #%htdp 0) #(50001 module)
   #(50002 module #%htdp 0)
  matching binding at layer 1...:
   #<module-path-index:(mzscheme)>
   #(-967113051640681897 module) #(-967113051640681896 module teach 0)
  matching binding at layer 1...:
   #<module-path-index:((lib "lang/htdp-beginner.ss"))>
   #(44611 module) #(44612 module #%htdp 0)

Tested in 6.10.1 and 6.11.

Reproduce the (g 5) and (f 5) examples in the interactions pane with the definitions shown, then trace how placeholder definitions and interaction expressions are handled. Done means both calls evaluate without the ambiguous #%app binding error in the affected language levels.