Extremely long server transaction times for simple_fields::get_extended_retur…

I am experiencing extremely long server transaction times for simple_fields::get_extended_return_values_for_field.

Please see this screenshot of my server monitoring panel: https://i.imgur.com/bCAQpYk.png

As you can see, simple_fields_get_all_fields_and_values_for_post is another simple fields process that is taking a significant amount of time to process.

Any immediate ideas as to why Simple Fields would be bringing my web server to its knees?

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