Editor Scene View Camera Freezing and stuttering when moving

I use the Right-Click-Hold and WASD commands to look and move around in the Editor’s scene view. A few versions back, the scene view started locking up when I use WASD to move the view camera. The view would freeze and not move again until I release the WASD key/s at which point it would snap suddenly to the view camera position (usually far FAR past the point I was moving to).

I’ve also noticed that whether or not the mouse is moving influences the freezing, in that, if I constantly wiggle the mouse about, the view will resist freezing.

The freezing is similar to a much smaller lock-up which has always happened in Unity (for me at least) when the editor would lock up for a moment because it was loading a heavy scene as you move the view through it.

This morning I updated to version 5.3.3 but this problem persists.
Has anyone else had this issue?

have had the same, and reported something similar with 5.2.1p3 (738830), seems to still have move delay in latest version also… (5.3.3p1)

I know this is an old thread, even has its own issue at Unity Issue Tracker - Scene View Navigation Delays

It still happens for me. (2017.4.37f1)
Activating “Animated Materials” in the scene view fixes the problem (because it constantly forces the scene view to redraw).

It seems to be something related to Keyboard Input in the Scene view.
As mentioned above, the mouse-move input is registered immediately and triggers a scene view repaint/refresh, but the keyboard seems to not register the WASD buttons as being continuously pressed for around the first second after you press a key.
Longer presses of keys work fine.