Hi Kurylo,
Here is the link to the public JIRA version (UE-52466); I’m sorry that I forgot to expose that and attach it to my original answer.
Our developers looked into this and made the decision not to allocate resources to fixing the HLOD issues that you are experiencing because we have some changes in the pipeline that will probably fix many, if not all of the issues that you are seeing. However we don’t have any info or a timeline that we can share at this time.
-TJ