Update: May 2021
Recently I have used [email protected] in Angular v11 and it’s working fine. You may try with the latest version
npm install ng2-charts@latest // it will automatically install latest version
Older
ng2-charts v2.2.4 has this bug as lots of users are reporting that so down-grading to ng2-charts v2.2.3 is fine until it is fixed in the future releases.
npm install [email protected]