LR 2015.4 with OS X 10.11.3 El Capitan.
Having some quirks with View Overlay options:
Library module - Loupe View - Info Overlay
Library module - Grid View Style - Does not appear to be any problems
Map module - Show map information cycles off and on correctly.
Thanks in advance for insights to correct this glitch.
I got to the root issue and feel like a dumb a**. The info 2 metadata fields for for all the images in the folders I was working on are actually empty. Nothing was displaying because there was no content.