Hello,
I have the radio on, receiving on TS2, I hear once in a while short bursts of conversations being held on TS1, lasting a tenth of a second more or less.
Same here, I was actually going to document it as a bug.
I suspect that due to bit errors that sometimes might affect the TS field, some frames are in the wrong TS. This means that if you are listening to TS2 sometimes you receive audio frames from TS1....but if you are in TS1 when this happens, probably it means that you loose some audio frames (that are treated as if they were for TS2).
This can be better experienced when one TS is silent and there is traffic in the other TS.
There are some bit recovery functions that are applied to every dmr frame but probably not all errors are recoverable. I will investigate if something can be done, maybe keep track of wht TS was being used for centain DMR stream ID (each time you use the PTT a new stream id is created and used during the whole transmission)
David