Problem with attachments in DC/DC Pro

[#1]

I have found problem with attached files in DC version (in XI or 7 it shows correctly). Language of files and diacretic signs - in Polish. 

Filenames of attached files contain polish diacretic signs. Before attaching them - correct diacretic signs. After attaching - asian-like instead of polish. Text of main file is ok tho. Attachment list looks like that: 

If I open any of those attachements - contents are fine. BUT if I edit main file in DC PRO while having those scrambled names in attachements - the whole main file will go bad also. 

Problem is that if I open the same file in older viewer version (or even edit main file with older pro version and save - no problems there - it only concerns DC).

List of used fonts from main file:

If I open files from attachments list directly or save file and open (files will save with asian signs but will open) - files contents are OK.

Fonts used in attachments:

All files have only one font: 

Main file with attachments is digitally signed, attachments are not individually digitally signed.

Once again - opening this file in older verisons give no problems, it only concerns DC.

[#2]

I have found problem with attached files in DC version (in XI or 7 it shows correctly). Language of files and diacretic signs - in Polish. 

Filenames of attached files contain polish diacretic signs. Before attaching them - correct diacretic signs. After attaching - asian-like instead of polish. Text of main file is ok tho. Attachment list looks like that: 

If I open any of those attachements - contents are fine. BUT if I edit main file in DC PRO while having those scrambled names in attachements - the whole main file will go bad also. 

Problem is that if I open the same file in older viewer version (or even edit main file with older pro version and save - no problems there - it only concerns DC).

List of used fonts from main file:

If I open files from attachments list directly or save file and open (files will save with asian signs but will open) - files contents are OK.

Fonts used in attachments:

All files have only one font: 

Main file with attachments is digitally signed, attachments are not individually digitally signed.

Once again - opening this file in older verisons give no problems, it only concerns DC.