Steps to reproduce:
In Firefox, set Kagi as your default search engine
Type "5 * 5" into the search bar
No quick answer of '25' is shown
In some cases in the past with both Google & Kagi I've needed to append an "=" to make it clear that it's a calculation, and that's stopped working too, even in the full search results. When searching for "10 + 10=" today, the answer isn't suggested in the search bar, and the full search results page doesn't show the calculator either.
Expected behavior:
A quick answer is shown directly in the search suggestions.
A calculator is shown when searching for a calculation that ends in "="
I'm very confident that this worked correctly last week and in the past (I use the search suggestions as a quick calculator maybe 50 times a day, for instant access to quick calculations as I'm using the web).
I do see other Kagi suggestions in the Firefox search bar correctly, just not calculation results. This calculation suggestion trick does still work totally fine for me when switching my search engine back to Google in the same browser, so it is a Kagi specific issue.
System info:
Firefox 97.0.2 on Ubuntu, 'international' region.