Trailling slash is missing

Hello,
I remember WP automatically add a trailling slash after the url if we don’t type it in.

Now I moved to a new host, I noticed that I can get the same page with or without “/”, WP no longer add it automatically.

I don’t remember what I previously did to get the “/” automatically added. My permarlink didn’t change, still /%year%/%postname%/

Is it because WP 3.05 changed rule? or I should add some settings to make it work?

Regards