Some groups are not visible when trying to import from AD in PDM

Hello, we recently started the synchronization between AD and PDM. But when we try to import groups from AD, some of them are not visible from the PDM administration console. When comparing such groups directly, I do not find any differences. I use the "ADUC" console when comparing the groups. Has anyone had a similar problem? How can I make PDM "see" all AD groups?