Hello Kay,
Thanks for getting in touch and sorry for the trouble here!
Do you happen to have a link where I can see the issue? The search by date functionality appears to work correctly on my own test site, but perhaps it would be helpful to see the issue in action on your site.
Also, will you please follow the steps outlined in this guide and let me know the results? This will help determine if there is a conflict at play and, if so, where it is.
Let’s start here and see what we find. 🙂
Thanks!
Geoff