@akshatchoudhary,
CanvasJS charts seems to be working fine with salesforce lightning web component. Please take a look at this Github Repo for the working code.
If you are still facing issues, kindly create a sample project reproducing the issue and share it with us over Google Drive or OneDrive so that we can look into the code, run it locally to understand the scenario better, and help you out.
—
Thangaraj Raman
Team CanvasJS
