thanks for this suggestion! i now found that a contraption i made (just a resizable picture, didnt put any script) is the actual source of this issue.So i guess its just that the contraption and flipbook now suddenly wont work together on one card? u can see here
Ugh, shit. The problem has nothing to do with zazz, or with your code; it's a regression in Decker. The contraption is bubbling its view[] event to the card (which should never happen). As a temporary workaround, add an empty view event handler to any contraptions which don't otherwise do something with view[]:
on view do end
Thanks for your help in identifying this issue.
I believe I have this fixed; the version of web-decker on beyondloom incorporates the patch, and it will be included in the next binary release.