reverting the beam-exceptions immediately

[Stefan Thomas]

Dear community,
in the below quoted example I can reset the beam-exceptions only after a time-signature-change.
How could it be possible restting the beam-exceptions without a time-signature change?

\version "2.14.1"

\new Staff {
  \time 3/8  
  \unset Timing.beamExceptions
   \set Voice.baseMoment = #(ly:make-moment 1 8)
  \repeat "unfold" 3 { \times 2/3 {c'16 d' e'  }}
  \unset Voice.baseMoment 
  \revert Score.TimeSignature #'beamExceptions %this works, but only when the time-signature changes!
  c' 16 d' e' d' c' 8 
  \time 3/8  c' 16 d' e' d' c' 8 
}