I am having an issue on LR where the photo has been edited on PS and the edits won't reflect on LR until I edit it on LR. Most up to date LR version on W10 (same for PS), I have read metadata from files and I have synced the folder.
If I go to edit it will show what was done in PS, but when I go back to Grid mode it does not show any more. But if I do any small edit on LR (in this case I have cropped as an example) then it reflects on the grid view.
Definitely a little glitch there when the image comes back from Ps. There is a Photoshop / ACR update that came out today. Have you updated yet? Try that and see if it still behaves the same way after.