This definitely looks like a Sonoma bug. It only started happening recently to me and i'm currently on Sonoma 14.1.
In any case, I was able to quickly fix this issue by following the steps here: https://support.apple.com/en-us/102321
In short, you have to exclude your home folder and then remove it from the exclusion so that it is re-indexed:
Topic:
App & System Services
SubTopic:
Core OS
Tags: