score:2
It looks like TinyMCE had a bug where it failed to remove a partially initialized editor. I think your component is being unmounted too soon after being mounted.
The bug was fixed in TinyMCE version 4.7.7: https://github.com/tinymce/tinymce/blob/6b0075fdac4d190614de7d815d067b93300f029d/changelog.txt#L140
Source: stackoverflow.com
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