Why is the cache not updated correctly in the cached area when calling the CIBlockSection::GetList method?

Question

1C-Bitrix

Good evening everyone.
What I have:
In the parameters, the cache lifetime is 30 seconds.

template.php

<pre>
  <? var_dump($arResult) ?>
  </pre>

component.php(CIBlockSection::GetList method):

if ($this->StartResultCache()) {
  if (!CModule::IncludeModule("iblock")) {
    $this->AbortResultCache();
    ShowError("IBLOCK_MODULE_NOT_INSTALLED");
    return false;
  }
  $arSort= array("SORT" => "ASC", "DATE_ACTIVE_FROM" => "DESC", "ID" => "DESC");
  $arFilter = array("IBLOCK_ID" => $arParams["IBLOCK_ID"], "ACTIVE" => "Y", "ACTIVE_DATE" => "Y");
  $arSelect = array("ID", "IBLOCK_ID", "IBLOCK_SECTION_ID", "NAME", "DATE_ACTIVE_FROM", "DEPTH_LEVEL", "UF_MAIN_SECTION");

  $rsElement = CIBlockSection::GetList(false, $arFilter, false, $arSelect, false);

  while ($obElement = $rsElement->GetNext()) {
    $arResult["ITEMS"][] = $obElement;
  }
  $this->SetResultCacheKeys(array());
  $this->IncludeComponentTemplate();
}

component.php(CIBlockElement::GetList method):

if ($this->StartResultCache()) {
  if (!CModule::IncludeModule("iblock")) {
    $this->AbortResultCache();
    ShowError("IBLOCK_MODULE_NOT_INSTALLED");
    return false;
  }
  $arSort= array("SORT" => "ASC", "DATE_ACTIVE_FROM" => "DESC", "ID" => "DESC");
  $arFilter = array("IBLOCK_ID" => $arParams["IBLOCK_ID"], "ACTIVE" => "Y", "ACTIVE_DATE" => "Y");
  $arSelect = array("ID", "IBLOCK_ID", "NAME", "DATE_ACTIVE_FROM", "PREVIEW_TEXT", "PREVIEW_PICTURE");

  $rsElement = CIBlockElement::GetList($arSort, $arFilter, false, $arNavParams, $arSelect);

  while($obElement = $rsElement->GetNextElement()) {
    $arElement = $obElement->GetFields();
    $arResult["ITEMS"][] = $arElement;
  }
  $this->SetResultCacheKeys(array());
  $this->IncludeComponentTemplate();
}

What I do:
Now I'm studying the mechanism of caching and it just so happened that I started with caching on bitrix. I noticed such a thing that if I call the CIBlockSection::GetList method in the cached area and put the result of the selection into $arResult, then:
1. When the cache is cleared on the page, I get the result of the template.php selection;
2. When an infoblock element is changed, the cache is updated, but there is no selection result in template.php;
3. When the cache lifetime ends, I initiate a hit, but there is no fetch result in template.php;

If I use CIBlockElement::GetList in the caching area, then everything works fine:
1. When the infoblock element changes, the cache is updated, and the result of the selection goes to template.php;
2. When the cache lifetime ends, I initiate a hit, and the result of the fetch gets into template.php;

Question:
Is the problem in the CIBlockSection::GetList method itself or in my code?

Answer 1

As a result, the problem was not in CIBlockSection::GetList, but in CIBlockElement::GetList. For some reason, CIBlockElement::GetList was ignoring the access rules that are set in the infoblock settings. More details in the comments to the question (see above)