Hey,
not entirely sure if this is a bug or something has changed with useBlurCloseExponentialShadowMap but after switching to 3.2, when loading any scene that uses that shadow type, for like a split second you can see the actual shadow map or something weird on screen?
This can be recreated here by commenting in/out line 16
https://www.babylonjs-playground.com/#0TG0TB
When you change the position/rotation of the light or some shadowGenerator settings it also changes the shape of the image that flashes.
Interestingly it also happens every load on chrome, but inconsistently on Firefox, tested in both Windows and Ubuntu.
Included a screenshot, still trying to figure out what it is but I honestly don't know enough ?