How to filter by multiple property in Highload blocks?

Question

1C-Bitrix

Hello!

There was a problem with filtering highload infoblocks (it seems after the last update of the BUS) (Version 20.0.1187).
There is an infoblock with multiple property "Binding to infoblock elements".

Until the last update, filtering by this property worked correctly

$rsData            = $entity_data_class::getList(array(
  "select" => array("*"),
  "order"  => array("ID" => "ASC"),
  "filter" => array(
    "UF_USER"       => array_keys($arCityUsers),
    "UF_DIRECTIONS" => $directions // Множественное свойство
  )
));

Now it gives an empty result. I searched the documentation for a solution to this problem, but to no avail.
Can someone tell me how to write a filter for a multiple property now?

Answer 1

In general, you puzzled with an interesting question, there is no way to understand the intricacies yet. Write UF_DIRECTIONS_SINGLE instead of
UF_DIRECTIONS