TLM_REPORT_INTERVAL_MS=320LU
It makes the TX module send the telemetry data to the OpenTX every 320 ms by default. This stops the telemetry lost warnings when running a high telemetry ratio, or low rates like 50hz.
Default value is 320LU. If you want to change that you have to suffix your milliseconds value with LU. For example, in order to specify 100 ms telemetry update rate you have to enter it like this: 100LU.
Typically, you want to keep 320LU value for OpenTX based radios, and 100LU for ErskyTx ones.