Ionic v3 angular2-signaturepad not working in prod build but working in release

[zhb94]

Angular2-signaturepad: Unable to paint in prod mode on device

In browser mode or in normal build the drawing works properly. But when you build in --prod or --prod --release does not succeed in drawing and gives the following error vendor.js:1 ERROR ReferenceError: a198254 is not defined at a._calculateCurveControlPoints (10.js:1) at a._addPoint (10.js:1) at a._strokeUpdate (10.js:1) at a._strokeMoveUpdate (10.js:1) at HTMLCanvasElement._handleTouchMove (10.js:1) at t.invokeTask (polyfills.js:3) at Object.onInvokeTask (vendor.js:1) at t.invokeTas…

i did every possible solution in this thread but nothing works