Slate error despite loading in content and passing "isEditor" check

[leehol]

Title says it all.

Error I get is:

Uncaught Error: [Slate] editor is invalid! you passed:{"children":[],"operations":[],"selection":null,"marks":null}
    at slate.tsx:36:1
    at mountState (react-dom.development.js:15626:1)
    at Object.useState (react-dom.development.js:16248:1)
    at Object.useState (react.development.js:1508:1)
    at Slate (slate.tsx:28:1)
    at renderWithHooks (react-dom.development.js:14985:1)
    at mountIndeterminateComponent (react-dom.development.js:17811:1)
    at beginWork (react-dom.development.js:19049:1)
    at HTMLUnknownElement.callCallback (react-dom.development.js:3945:1)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:3994:1)

However, editor has children content, and Editor.isEditor(editor) returns true (I force a check for this condition prior to rendering). I am passing "value" as props, which also has a loading condition.