Yaapu telemetry with FrSky R9 Slim+ OTA

Hello!
So far I have used the Jumper T18 with the FrSky R9 Slim + (Accst, Flex, Fport) receiver with Yaapu telemetry. Everything worked fine except for the small telemetry range of about 100-200m.
I decided to buy a new FrSky R9 Slim + OTA (Accst, Flex, Fport) receiver, I have a problem with receiving Yaapu telemetry, it does not work. I think there is a problem with the telemetry cable not compatible with this receiver.
Do you know what to do to make it work?
Thanks!

use it with qx7. everything work fine. R9 Slim+OTA. Latest ACCST FW in R9 TX and Slim RX.