Many Problems with RW6 and El Capitan

Hello,

i have updated to RW 6 and El Capitan wiht Stacks 2 it was slow but it works.
But know i have updated to Stacks 3 and some Stacks didn´t work again!
(Responsive Image as a Symbol)

Please can anybody help me! i have to work on my projects, but all my Stacks didnt work with this!

Thanks!

I had something similar - i just dragged a new stack on the page - this seamed to get everything to re-appear - n then i removed the stack i’d just dropped in