So I'm using the latest version of PS.
When I highlight texts and try to change their size or other values on the character panel, none of the changes show on the live preview. This of course i annoying and slowing my work flow as I keep having to input values and only after accepting it seeing the result.
I'm using win 10 64, I7, geforce 1080 with all the latest drivers installed.
Try today’s Photoshop 2018 update. Live preview working again... (Photoshop 19.1.0, macOS 10.12.6)
Ha! I didn't know a new update came out today (it's morning here)! Cool I'll give it a try, thanks!