When I run "Rift and Touch" setup and use both Touch controllers at the same time."Sensor Communication Test" will have a waring. But if just only one touch controller will not happen.
While this is wild guess, Touch controllers are connected via radio to Rift, so if you have 2x Touch it means more data is transmitted from the headset, more than no touch or one touch. Poor tracking quality can simply mean USB bandwidth is not enough to support reliable tracking. Try switching the headset to different USB controller (ie front USBs, USB3.1 etc.) than sensors.
It's still have the same issue.Is it because my Touch controllers version is different? One is "CO6AC".other is "OC6AI". When I connected the two controllers and move the touch controllers will be very delay.But if just connect one of the touch controller is ok.