While verifying the click counting fixed issue, I found the system font had been changed from Arial to Times New Roman.
I checked the setting based on this post. The Arial font looks fine on mysite/wizard/steps/fonts.
I didn’t install theme, my current theme is the default one.
And I changed the basic setup font to Arial (from Notosan in the past), the outlook is still Times New Roman.
Looks like there are some codes related to font have been changed today.
My updating before and after information:
How can I solve this problem? Thanks for help.