Before begin using me precius time... can Room and Compose coexist in dev04 ?

Only in separate modules AFAIK not sure if its unrestricted now for dev04 though

AFAIK, any annotation processor, that generates JVM bytecode conflicts with Jetpack Compose, as it generates IR

When will it be fixed ?

No the problem is in kotlin.

So... kotlin has to change ?

The ir backend which is used by compose to generate code is not stable yet.