How to reproduce:
1. Open the user attached project (cubeRenderer.zip)
2. In the Project view go to "Settings" and select the "Forward Renderer" asset
3. In the inspector set the following ambient conclusion values:
Intensity to 10
Direct Lighting Strength to 1
Radius to 0.5
4. From the Project view open the "rpgpp_lt_scene_1.0" scene from "Assets > RPGPP_LT > Scene"
5. In the menu bar go to: GameObject > Better Cubemap Renderer
6. In the "Renderer cubemap" window assign the "Main Camera" to the "Cam" property and press "Render\!"
7. In the Project view go to "Assets > Editor > cubemapOut" and open the "output.png" image in any image viewer

Expected result: The ambient occlusion is applied normally to the output cubemap
Actual result: The ambient occlusion is incorrectly applied, appearing as darker lines and areas on the image

Reproducible with URP: 10.6.0 (2020.3.14f1), 11.0.0 (2021.1.13f1), 12.0.0 (2021.2.0b3, 2022.1.0a1)
Couldn't test with: 7.7.0 (2019.4.29f1) (Missing the Ambient Occlusion renderer feature)

Note: Reproducible on Ubuntu 18.04 and Windows 7