When using the addPreSearch JavaScript function to filter a lookup field on a form based on an option set value on that same form. However, when changing the option set more than once in a given user session, the search for that lookup field no longer returns any records. The product team has acknowledged that this is the behavior driven off of the current API implementation which feels like a bug. It would be nice if this function worked consistently regardless of which field type is used in the lookup filtering call.