Searchable fields usability issue when more than 250 matches - error - 'fieldname' has an invalid selection. Please select a valid value to complete this transition.
For a searchable field, enter a non-ASCII string, such as "Системная". If you have SSO enabled, this will change the search field to "searching" and the query never returns.
The SBM Javascript Library's "isFieldEmpty()" method when executed on a searchable Relational field returns FALSE when the search response is "More than 250 matches...". This case should return TRUE, ex. the field is indeed empty when this is the result of a search. This impacts the custom JS functions (and potentially form actions) which use this method to check if a field is empty fail to detect relational fields empty in this case.
A searchable relational or multi-relational field with the "inactive items appear in selection lists" option set will not list inactive records unless the search is done with a blank search value. A non-searchable relational or multi-relational field with the "inactive items appear in selection lists" option set will not list any inactive records to be selected.
There is an issue with setting certain field types to display as searchable rather then a single drop down list. This will be fixed in a future release.