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I just upgraded to v7.55, and changed a couple of settings based on what the changelog listed as being changed on new installs, but nothing to do with any debug settings. After saving the settings through the cPanel/WHM UI, I see this "warning":
If my setting is already in the "recommended range", then why am I getting a warning? If this sanity check notice is meant to be there, I'd suggest changing the wording from "warning", as that typically means there's something wrong.