macOS 10.13.6, G2.6.2  – New behavior for the Info box. When scrolling horizontally in a glyph window, and with Show Angled Handles and Show Coordinates of Selected Nodes active, the Info box moves in a jerky manner. With those two disabled, the Info box exhibits a quick, jittery behavior while scrolling.
Possibly related, I also note that with those two plugins active, the app performance seems to have improved a little. The agonizing lag I have been experiencing, while still slow, is better.