How to reproduce:
1. Open User's attached URPTemplate.zip project
2. Open SampleScene found in Assets -> Scenes
3. Enter the Play mode
4. Move the mouse while holding Right Mouse Button
5. Observe the Quad

Expected result: when moving the mouse clear image is reflected on the Quad
Actual result: when moving the mouse the image in the texture applied to the Quad is 'smeared' around

Reproduced in: Universal RP 7.0.1 (2019.3.0b5, 2020.1.0a5)
Not reproduced in: Universal RP 7.1.1 (2019.3.0b5, 2020.1.0a5)
Could not reproduce in: 2017.4.32f1, 2018.4.10f1, 2019.2.7f2, 2019.3.0a12 (no Universal RP)

Notes: Only happens with URP 7.0.1. Upgrading the URP package (7.1.1 is available on 2019.3.0b4 and above) fixes the issue.

Workaround: enabling "Render Post-processing" in the Camera with Render Texture fixes the issue.