4.2.1 upgrade using crsf and RSSI_TYPE=3 understand readings

I just upgraded to 4.2.1 which now allows the full use of tbs crsf for radio control and telemetry and rssi. I have RSSI_TYPE=3 and am reading 100 when close but when i go out a few feet it quickly drops to below 50 and even down to 30. I have gone out over 2 miles and have not had a failsafe. In 4.0.9 i was reading lq or rssi via a channel which seamed to work well. I have now reclaimed this channel. I also don’t get any Rssi or lq alarms from opentx which i have set up according to tbs. Can someone help me learn what these readings are when using the receiver protocol to measure rssi?