问题
After updating the latest android chrome (version 85.0.4183.127) on Android 6 My App started having issues on the HTML5 canvas which is responsible to capture/draw signature from the user. My App is a hybrid app that is built on the Sencha JS framework.the capturing signature code is written on HTML5 canvas (HTMLCanvasElement).
Key points: 1.signature Issue is all android-OS version which is updated to chrome (version 85.0.4183.127).2.The app is based on sencha touch2.4 3.cordova is used for creating a Mobile version of the android and iOS app. No issue with the lower version of android chrome.refer to the attached image.
code used from here https://github.com/SumanBoss/Sencha-Touch-2-Signature-Pad-Field
来源：https://stackoverflow.com/questions/64244545/secha-touch-signature-draw-issue-with-htmlcanvas5-after-updating-android-chrom