I had diligently updated all my deprecated methods and options after upgrading to 2.8.0, and then when I ran composer and it moved to 2.8.1, all my forms that used collections of related entities broke. I had updated 'options' to 'entry_options' in all my form builders. Now I see the error "The required option "class" is missing." I have 'class' defined in my entry_options. It appears 'entry_options' is no longer being used in 2.8.1?

I have reverted to 2.8.0 temporarily pending further guidance.