Stuck on "Retrieving Item Information..."

Been having this happen a lot over the last few days. Item vendors (specifically every vendor who sells swag for currencies other than gold) will display the icons and price for their wares but not the item label. When I mouse over the icon to try and interact, I get a tooltip notice that reads "Retrieving Item Information..." and cannot purchase or even interact with said item.

I've had the exact same thing happen with some items in my bags that you're supposed to click on to interact with, but these usually resolve themselves after re-logging. I did have one unfortunate instance where I couldn't complete Heroic Oculus because I was unable to click any of the dragon sigils to summon a flying mount; that was a case where re-logging didn't help at all.

Latency and game settings don't seem to have an effect on this either, as I've been consistently green since the patch and I can perform any other action lag-free. So far I've tried restarting the game client and turning off and deleting all addons, but this error persists. I'm not quite sure where to go from here. Is this known issue?