Blurry areas in terrain when using orthographic camera

I have created a terrain with pretty much standard settings. When using orthographic camera I have blurry rectangular areas both in scene view and in game view. When using a perspective camera I don’t have this problem. I am using Unity 2021.2.0b16 with Terrain tools 4.0.3.

Here is a screen shot when using orthographic camera:

It looks like this is somehow related to Mipmaps:

Any ideas what is causing this? Is this a bug or is terrain not intended to be used with orthographic cameras? I did not have this problem with earlier versions of Unity (earlier versions of 2021.1), but I would have to research to find out when it got introduced (I had ignored this problem for a while) and I might even be wrong with this statement.

Thanks for any help.

Best,
–Peter

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This problem is tracked as regression bug and it got introduced in 2021.2.

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One year later… still an issue in 2022.2.1f1…

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I wasted so much of my time. I wish I knew orthographic cameras were not friendly with Terrains. Frustrating!

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I’ve fixed it bu upgrading to 2021.3.24f1.