Power of two non square Virtual Texture causes crash if you resize it or change it in a Material Instance

Power of two non square texture make UE4 crash in Material Instance and in engine resize when it's set in VT

1. Open a blank project in the editor and enable Virtual Texture Support
2. Restart the Editor
3. Import a power of two non square texture (8192x4096 for instance) (in attachments)
4. Right-click the texture and convert it to a Virtual Texture
5. Open the new Virtual Texture
6. Under compression in the details panel, expect it and change Maximum Texture Size to 512
   Result: Editor crashes
   Expected: Editor is able to change it to 512 without crashing

No callstack in the project log