Increasing oj-select option list size to remove searching

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I have a oj-select element that is populated by binding a business object containing application data to the option list using an SDP. For two of these select elements I need to show all 20 options because the users won't know what to search for. By default the select element only shows 15 options. As per the oracle jet documentation I attempted to set the minimum-results-for-search attribute to 20 as per https://www.oracle.com/webfolder/technetwork/jet/jsdocs/oj.ojSelectMany.html#minimumResultsForSearch however the results still only showed 15 options. When I looked at the network console in chrome dev tools I saw the rest call still had a limit=15 query parameter. Am I misreading the documentation and/or could someone try and replicate this in their OIC VBCS version (I'm using 18.4.1)