Blocks not visible

Hey Community,
we switched from Elementor to Gutenberg (GeneratePress). We have already created several reusable blocks with generate blocks and Elementor.
Now I wanted to create more blocks and then insert and save them in the posts. In some cases, this worked, but some posts cannot be updated after inserting the new blocks.
What someone, what could that be?
In the posts that won’t update, there is always a dot before the update button 😕
Many thanks in advance!