With the Chrome (~79) update, you may have noticed that the Dev Tools variable hover > value feature has been broken. This issue is covered by 1033022 in Chromium; though, a stable fix for version 79 remains elusive.
For me, this was one of those “You don’t know what you got til’ it’s gone” type of situations as, I have become rather accustomed to this feature, and so having to rely on the Scope Panel has became quite tedious.
The good news is (or at least what has worked for me) was I was able to resolve the issue by simply uninstalling, then reinstalling Chrome. While generally this should be a last resort solution, and the fact that it actually worked is rather odd in that the same exact version was installed, it has worked, and so I figured I’d share for others to give a try until a proper fix is in place in Chrome 80.