TypeError: node.className.split is not a function

[heaven]

Happens when selecting an SVG.

TypeError: node.className.split is not a function
    at window.DomPredictionHelper.DomPredictionHelper.cssDescriptor (selectorgadget_combined.js:11018:33)
    at window.DomPredictionHelper.DomPredictionHelper.pathOf (selectorgadget_combined.js:10998:30)
    at window.DomPredictionHelper.DomPredictionHelper.getPathsFor (selectorgadget_combined.js:11311:25)
    at window.DomPredictionHelper.DomPredictionHelper.predictCss (selectorgadget_combined.js:11322:29)
    at window.SelectorGadget.SelectorGadget.sgMousedown (selectorgadget_combined.js:11760:45)
    at HTMLDivElement.dispatch (selectorgadget_combined.js:5430:27)
    at elemData.handle (selectorgadget_combined.js:5234:28)

When I check node.className it is not a string but an instance of SVGAnimatedString.