two things to initially check, although it may be (for example) an analog-patched
talkgroup or some similar case where the source itself contributes to the issue.... First
confirm the problem occurs when using a stock version of OP25. Second make sure the
number of error bits being corrected by the Golay decoders for c0 and c1 is close to zero.
If not it could be you're incorrectly using the fsk4 demod (apparently all p2/tdma
systems prefer the psk demod)...
Max