Reproduction of the problem
ng2-charts is a port & modification of Chart.js component for Angular 2. Sometimes the issue is related with Chart.js instead of ng2-charts.
To confirm, if the issue shows in a pure Chart.js project, it is a issue of Chart.js.
Pure Chart.js starting template: https://jsfiddle.net/Hongbo_Miao/mvct2uwo/3/
If the issue does not show in a pure Chart.js project, and shows in a ng2-charts project, please try to provide a minimal demo of the problem.
ng2-charts starting template: http://plnkr.co/edit/Ka4NXG3pZ1mXnaN95HX5?p=preview
I would also like an answer for this
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any updates here?
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Check this stackblitz: https://stackblitz.com/edit/ng2-charts-doughnut-centertext
It's based on this SO answer: https://stackoverflow.com/a/43026361/235648

Most helpful comment
Check this stackblitz: https://stackblitz.com/edit/ng2-charts-doughnut-centertext
It's based on this SO answer: https://stackoverflow.com/a/43026361/235648