Chrome Observer Api Bug

[kursatkarsli]

Reporting a Bug?

[Lormanari]

I can't be completely sure, since there are many reason to cause this error, but checkout this: petyosi/react-virtuoso#875 (comment)

If this warning happens only after using forked react-sortable-tree, then probably it's safe to ignore or you can upgrade react and react-dom to latest version

[wirys]

This error also occurs in my application