Importing PDF to FrameMaker 2019 Structured

Hello.

We have strange problem when importing PDF to structured FM files. This applies to FM2019. In FM12 it works normally.

Attached is gen0-2_2019.fm file (I cannot attach it here. it says vnd.framemaker extension doesn't match or whatever...). Link is here: GEN 0.2 FM document

When we import PDF after table it will not show imported PDF. See this:

When I insert Chart element (which is pgf container). The imported PDF looks normally. See this:

For some documents even creating Chart element doesn't help and PDF is displayed like this small square. If I delete the table in gen0-2 document I can insert PDF without Chart element. It is not important what PDF contains. It happens with every PDF.

What is funny that when I save FM document with PDF to MIF the link is there looking PDF was succesfully imported.

What can this be for a problem?

Thanks.