If I make a mask (say using the select subject tool) and then try to add/subtract areas from that mask by selecting "brush" then the brush tool disappears when I try to move it over the image... so I cannot see where the brush is or how to move it...

I don't think the brush is actually working then anyway as I cannot seem to be able to subtract anything even when I manually change the brush size.

Sometimes it seems to half work and sometimes not. I'd say for sure that using the brush tool to add/subtract from, at least, masks generated by "select subject" is very flaky now compared to how it was in earlier versions. So much so that I am now having to find workarounds rather than tray and work out what the issue is.

This appears to affect editing of DNG files but not (say) NEF raw files, which I seem to be able to edit as I did before.

Bridge - 15.0.2.432
Camera Raw - 17.1
Intel Mac running Sequoia 15.2