[Freeswitch-users] DTMF both inband and RFC2833?

hi: I use peer reg at fs.If peer only send inband DTMF signal,fs passthrough it.But if peer send both inband and RFC2833,then fs can`t passthrough signal.I try add start_dtmf at dialplan,no change.This is bug?Or how I can pass both them?Thank you!