Wed Apr 17, 2019 9:02 pm
I do not have the latest update 2019-03-20, but my lock screen clock never showed seconds that I know of.
I looked, I don't even have the option for that *on the lock screen clock*.
If you're willing, you could install a third party cock like Night Clock and set it as your screen saver. It's a workaround that shouldn't be needed but sometimes third party spa are just better for some things, unfortunately.
But no, if you had that option before, I don't think an update should remove it (but I'd like to know how to get that as a built-in option, myself, because that would come in handy for me, too, to have that on the lock screen).