Stackable Gutenberg blocks and Astra

We are using Astra Pro, but also happens with Astra free. After last update, 4.8.12, when we are editing some buttons layout with stackable, what we see editing the page is totally different with what we saw in the published age (logged or not). Up to 4.8.11 it was working. If we change to another theme, Stackable will work as expected. I tried to rollback (up to 4.8.9), but the problem still happens.