There as so many mis match on ai

Yes, I've been doing that too, consequently time and credits are eaten up very quickly.

@Chris Maddrell When I refer people to Photoshop, I am referring for generative fill functionality of Firefly specifically, not all Firefly capabilities.  Recent versions of Photoshop also have generative fill (See: Generative Fill. Now in Photoshop).

Text to image, which is where the reference images (Structure and Style) are, does not seem to have the problem, as illustrated in @Yousat368830682fjs photo above.

Given all that, I am not sure exactly what you are asking, but if you are using text to image and generative fill on your project, you can use Firefly text to image and then take the generated photo into Photoshop for generative fill (which is mostly what I have been doing until this problem is fixed).

I note your repeated response, @droopydog500 , that gen ai is ok in PS but I only have the reference image function in Firefly. I'm on a project involving a lot of buildings at the moment so am finding that very useful. I'm not aware of a similar function in PS.  
Thanks

Yes, there is a problem with generative fill from the last release that is causing this to happen sometimes. Adobe is aware and working on a fix. Until that is released, if you have access to Photoshop, generative fill in Photoshop does not seem to be affected by this problem.