It's a common problem.
Prevention? Do not alt-tab out of the game.
If you really need you minimize GW to check something on the web, be sure to swap to windowed mode first (on of the icons in the upper right corner of the screen), and then open your browser without minimizing GW, merely putting it behind the other window. More often than not, it helps, but sometimes after going back into full screen, you may be rubberbanding a bit.
Other than that - just wait a while. Rezoning several times helps with rubberbanding. Or just waiting it out, playing the game ignoring the issue, until it fixes itself.