Render target resettting when upgrading 2020.3.32f1 (SRP)

Hey everyone, I started seeing an issue when upgrading unity and I was wondering if someone has some tips on what could've caused it. I'm pretty green with graphics programming / SRP in general, FYI.

The issue doesn't happen on the original version (2020.3.19f1, using URP package 10.6.0), but I'm seeing all black as soon as I move to 2020.2.32f, which automatically upgraded me to URP 10.8.1.

We're using a pretty customized SRP. I managed to narrow down the issue to a specific ScriptableRendererFeature. What we're doing there is basically:

• we listen to RenderPipelineManager.beginFrameRendering and create 4 render textures in it (msaa color buffer, msaa depth buffer, a color texture and a depth texture)
  
• we release those textures on RenderPipelineManager.endFrameRendering
• the feature has 2 passes, one for BeforeRenderingOpaques and one for BeforeRendereringTransparents
  • BeforeRenderingOpaques:
    • here we set the render target to our msaa color/depth buffers
    • we do a ClearRenderTarget
  • BeforeRendereringTransparents :
    • here we set the render target to our color/depth texture and draw to them
    • then pass those textures to _CameraOpaqueTexture & _CameraDepthTexture using SetGlobalTexture
    • then set the render target back to our msaa color/depth buffers

All the render targets setting is being done using CommandBuffer.SetRenderTarget(RenderTargetIdentifier, RenderTargetIdentifier).

One difference we noticed using the Frame Debugger is that the RenderTarget resets to unity's own `_CameraColorTexture` as soon as DrawOpaqueObjects start. This didn't happen before upgrading, we would still keep our own MSAA color buffers as a RenderTarget while DrawOpaqueObjects was happening.

I hope this wall of text makes sense! Any tips appreciated as I'm still learning how all this works