Adding more keywords to a lens expects all of them at one to appear on given site. New lens is much more restricting causing old keyword configurations to not display any results.
I think before it used to pin matching results more or less. Currently it discards them so adding more keywords makes search results visibly less.
for example a lens on
https://learn.microsoft.com/en-us/windows
with keywords
microsoft, coding, testing, winapi
the search therm "windows" returns nothing. This was not the case before
same lens with keywords
microsoft, coding, testing
return 9 results
I had to reduce amount of keywords in my lenses to allow them to work again
