Hi TPapp,
Thanks for reaching out to us here. Welcome! Product and feature updates are meant to improve your overall experience with QuickBooks Online. However, we all know that with any update, there are some areas of concern, along with temporary glitches.
I appreciate that you have taken the time to perform some troubleshooting steps. I have reviewed this situation in my own QuickBooks account and the Search engine seems to be functioning as designed. However, the issue you're experiencing has been reported by other customers. For this reason, I encourage you to contact our Customer Care team at 1-855-253-1536 from Monday to Friday between the hours of 9 AM and 8 PM EST. They will be able to gather the necessary information in order to escalate it for further investigation with our Development team. In addition, they'll add you to the list of affected users, and set you up to receive an email notification when it's been fixed.
Please don't hesitate to reach out again, if you have any other questions or concerns. We would be happy to help!