Updater uses catch all not diff patchSolved

I generated update files and there is a diff patch from 1.7.1.1 to 1.7.1.1.1 that is 253KB
there are also catch alls and previous versions
I tried updating 1.7.1.1 to 1.7.1.1.1 and it downloads catch all update not the 253KB diff patch
why?
can I debug updater somehow?