Hello David,
Note that NaN means arithmetic error. Something went wrong when it was calculating the values.
Engineering requested we submit a defect for a resolution to this.
Would you mind opening a support case reporting the problem against your site ID?
In the case call out the link to this Community post and conversation.
Add a note in the case requesting whoever is assigned the case reach out to me for input.
I'll help them get the defect submitted so we can get a fix for this as soon as possible.
Thanks,
Michael