Window contents goes black/empty when resizing

[mydoghasfleas]

(Not sure whether this is a duplicate of #200, so just providing more detail).

V version: 0.4.0

UI version: 0.4.4

OS: Windows 10

What did you do? Compiled and ran users.v from the examples directory. Resized the window a few times.

What did you expect to see? Seeing window contents while resizing.

What did you see instead? Screen becomes black and sometimes flashes while resizing.