Sounds like a real reason. But, actually, we are not so crazy about labels and trademarks in Russia, so Roscosmos will never protest against their symbols in one of the most popular space engineering game =)
Anyway law is law, so I can try contact Roscosmos with suggestion to grant Squad an official permission to use their symbols.
All i need is Squad approving of this action, official proposal letter from SQ to RC, correct email where official answer to be send back and, surely, LUCK.