System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.59

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: rB375c7dc4caf4
Worked: (optional)

Short description of error
The magnet icon stays gray or blue when moving vertices around and hitting <kbd>Shift</kbd><kbd>Tab</kbd> to enable/disable snapping. The icon only updates when the user ends the grab and hovers over it.

Exact steps for others to reproduce the error
Enter edit mode. Select at least one vertex. Hit <kbd>G</kbd> to grab them. Use the <kbd>Shift</kbd><kbd>Tab</kbd> command to enable or disable snapping mode. Notice that the magnet icon at the top of the viewport has not changed. Move the mouse over the magnet icon and it refreshes to show the correct state.