Error with styling external tooltip: bodyFont not found

[vividos]

Expected Behavior

External tooltips should work as mentioned in the documentation

Current Behavior

The external tooltip function issues a JavaScript error on non-existant object tooltipModel.bodyFont.

Possible Solution

None known to me

Steps to Reproduce

I have no complete codepen demo, but it's easy to create:

• In the settings, refer to https://www.chartjs.org/dist/master/chart.min.js, to test 3.0.0-rc
• Copy and paste from the documentation: https://www.chartjs.org/docs/master/configuration/tooltip#external-custom-tooltips (the whole "plugins" section)
• As soon as a tooltip is shown, the JavaScript error appears in the console:

Uncaught TypeError: tooltipModel.bodyFont is undefined

Inspecting the tooltipModel, there is no object of this type. May just be a documentation error, though.

Context

I'm testing the external tooltips functionality, as I'm using it in my project, which I'm trying to port to Chart.js 3

Environment

• Chart.js version: 3.0.0-rc
• Browser name and version: Firefox 86.0.1
• Link to your project: -