Undocumented Attributes

Got some attributes in a response object that appear to be undocumented. I have a 100 page PDF and the majority of pages have their text extracted. The one in question though is instead extracted as an image. The JSON in question look like: 

{
			"Bounds": [
				79.85000610351563,
				108.1837158203125,
				546.1023712158203,
				714.25
			],
			"Page": 80,
			"Path": "//Document/Figure[3]",
			"attributes": {
				"BBox": [
					80.03669999999693,
					108.38799999999901,
					530.0179999999818,
					714.002999999997
				],
				"Placement": "Block",
				"Suspicion": "{ \"suspicious\" : true, \"reason\" : \"complexTable\" }",
				"SuspicionFBName": "region-complexTable",
				"Suspicious": true
			},
			"filePaths": [
				"figures/fileoutpart18.png"
			]
		}

Can anyone help me understand what the "Suspicion", "SuspicionFBName", and "Suspicious" attributes mean?

The data is formatted in a rough table for this section, but the table spans several pages and this is the only one to be extracted as an image. If I open the PDF in Reader I can select the text on that page just fine, it does not present any obvious difference from the pages around it.