Problem: Currently if you try to search form rules containing a particular opportunity field in the search bar, it does not yield any results. This is a bug and will be fixed in upcoming releases.
Workaround: Remove the opportunity code in the search query along with its underscore >> @{opportunity_12001:mx_Custom_1,}

An internal dev ticket has been raised to track this bug. We’ll update it here once it is fixed – #860502
