Incorrect beaming inside Grace

[arshiacont]

Unit Test:

{[ \staff<1>  
   \clef<"g2"> \stemsUp 
   \grace( 
   \beamBegin:1 \tuplet<"7", dispNote="/32", position="above">( f0/56 a0/32 c1/32 e&1/32 \beamEnd:1 \beamBegin:1 f1/32 a1/32 c2/32
   )
 \beamEnd:1)
  ]
 , 
[ \staff<2> \clef<"f4">     ]
 }

leading to

If we just remove the grace, it leads to: