Ok, thanks.
Then, i’d say you just change the way you count the TBF drop. Even if it decreases the TBF drop %, from end user point of view, a drop is still a drop, even if it wasn’t counted by the MFS 🙂
There is a defense mechanism though, so that the PDCH goes back to MCS1 or CS1 if packets are lost. Perhaps by increasing the N1305limit would give more time for this mechanism to work.