5.1.1 update problem

General Feedback & Requests
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18

I had faced the same issue and just changed:
[/Script/DLSS.DLSSSettings]
bEnableDLSSInEditorViewports=True

to

[/Script/DLSS.DLSSSettings]
bEnableDLSSInEditorViewports=False

and it fixes my issue.
Hope it will fix yours too!