In the latest update to Photoshop CC 2018, character leading is broken. I cannot type into the box or manually adjust with the up down keys. This is a bit of a showstopper...
Pete.Green • Adobe Employee, Nov 14, 2017Nov 14, 2017
This should be resolved in the 19.0.1 update released last night. Please update Photoshop using the Creative Cloud desktop app, and let us know if it's fixed for you!
The jumping of values is fixed with the 19.0.1 release, now available. There remains a problem with previews of scrubbing and bumping not updating live, but this was a consequence of that fix and should be fixed with the next release.
The issue has not been fixed and as Rocco Tyndale said, it is now affecting the Type Size as well. We are 3 steps ahead and 17 steps behind with 19.0.1 update, sadly!