Probelm

The hazelnut UI becomes unresponsive when we resize the window. The reason for that is that our Application run loop pauses as it is still resolving Win32 messages. This causes such behaviour:

• When the scene is running and the window is resized, the scene pauses and when the window resize stops everything that happened in between is skipped.
• The scripting engine also pauses, potentially causing unpredicted behavior (this is just a theory, since I haven't tested this much as I had already fixed this unresponsive UI problem on the engine that I am building alongside @TheCherno).
• Since there is not a mininum size for the window, this is also possible.

Solution

Updating the window and layers in the OnWindowResize function in Application.