When Graphics APIs set to Vulkan and switching the Editor to Wireframe Mode then it causes the Editor to throw "Gfx command not handled" error continuously and also Scene View freezes, Refer attached video.

Error:
Gfx command not handled: 0 (Last command: 10123)

Steps to repro:
1. Create a New Project
2. Make sure Unity is set to Vulkan graphics API
3. Right Click in Hierarchy > 3D >Cube
4. Switch to Wireframe Mode

Note:Same thing happens in URP and HDRP template using vulkan graphics API

Actual Result:
Scene view freezes and unity continuously throws error in the console

Expected Result:
Scene view switches to wireframe mode successfully without any error in the console

Reproducible in:
2020.2.0b2

Working fine in:
2020.2.0b1, 2020.1.5f1, 2019.4.10f1, 2019.3.15f1, 2018.4.27f1

Environment:
Occurs only on Windows 10

Workaround:
Switch back to any mode other than wireframe mode then everything will work fine