Quick answer: Unity URP image effect script applied both to camera and to renderer feature, running twice? Migrating from BRP can leave the OnRenderImage hook active alongside the renderer feature.
Bloom effect appears too strong; same intensity is fine in BRP. URP applies both BRP-compat hook and URP feature.
Disable the OnRenderImage path
Remove the camera-attached script. Keep only the URP renderer feature. Single path; correct intensity.
Or migrate fully
Delete BRP-only image effect scripts. Re-author in URP. Clean migration; no double-paths.
Verify per camera
Inspect each camera's components. Lingering BRP scripts cause hidden double-apply.
“Render pipeline migrations leave artifacts. The migration is done when the artifacts are gone.”
Post-migration audit: list every image-effect-related component; delete BRP-only ones; verify URP equivalent exists.