Comment Threshold using Question Responses Filter

Has anybody else run into this? I opened a ticket because comments were being suppressed even if there were 10+ respondents when using 'Question Response' filters. Our threshold is 10. The engineering team said that 'Question Response' threshold are always 20 for comments regardless thresholds set in configuration. Why would the threshold configuration work for some filters but not others?! I can't find documentation either. Anyone else?