Unwanted comma in tooltip label

[lugosium]

Hello,

I have this issue but i don't understand the chart.js behavior here and why it's replacing white space by comma:

https://stackoverflow.com/questions/62096388/unwanted-comma-in-the-tooltips-when-line-breaking-a-label-in-chartsjs

Anybody know why it's working like this and how to prevent it properly?

Thank you!