Why does 5.1.5.2 crash multi lingual documents at 50K characters

I have a document set in a master document. The documents contain Greek, Hebrew and Latin alphabets in tables for alignment. They consistently crash at around 50K characters. The recovery is scrambling the tables and the Greek letters. What do you suggest?

PS: Fuck you and your freaking Tag generator. It takes longer get to past that crapware then it would take to rewrite War and Peace!