Is it true that TBS Crossfie Micro TX Module doesn't work on Taranis Q7X ?

They do work together, but telemetry doesn't without some DIY mods.

If you used them together out of the box, you can control the quad, but your taranis will constantly scream "telemetry lost, telemetry recovered..." repeatedly. Some RSSI weirdness and the LUA script also doesn't work

We don't know if this will get fixed because this is a compatibility issue between the 2 companies.

Basically the issue is baud rate from the Crossfire is too high for the QX7 hardware to handle. Some says it's Frsky's fault using bad components or something.