This is not only happening with superbloom, it happens quite a bit in Emerald Dream. It happens when you are doing superbloom, it happens when you are doing seeds, it just happens randomly without any warnings.
This is extremely annoying and disruptive to the gameplay. It is obvious Blizzard is trying some new layering tech with Emerald Dream and it is terrible. I made a post about this same issue the other day but got no responses.