Hello @esdanol.
there is such tool since 1.2.2 RealityCapture version: Introducing RealityCapture 1.2.2 | Course
This could be related also to your used settings.
Which version are you using? How big model have you tried to unwrap (be aware that mosaicing is even bigger that ordinary unwrap and it is still a beta. Also, you need to consider this - Cache for texturing: 500 bytes of storage for each triangle, or 1kb every 2 tris, or 1mb every 2000 tris, or 1 gb every 2 million tris, or 1tb every 2billion tris)?
Also, you can clear the cache directly from the application in the settings:
