Uncaught Error at onDestroy

[MaximilianMain]

In our application we get in some cases an uncaught error from ngx-gauge:
ERROR TypeError: Cannot read property 'clearRect' of undefined
at NgxGauge._clear (vendor.js:82965)
at NgxGauge._destroy (vendor.js:82999)
at NgxGauge.ngOnDestroy (vendor.js:82930)
at executeOnDestroys (vendor.js:136785)
at cleanUpView (vendor.js:136709)
at destroyViewTree (vendor.js:136535)
at destroyLView (vendor.js:136687)
at ViewContainerRef.remove (vendor.js:137797)
at ViewContainerRef.clear (vendor.js:137704)
at SafeSubscriber._next (main.js:15265)

The error happens on the call of the clear method of a ViewContainerRef in which the ngx-gauge is inside.

We are using Angular 10. Core: 10.1.1
I have tested it with 10.1.6 as well and got the same error.

Maybe in the _clear Method there should be a null check for the context?

private _clear() {
    this._context?.clearRect(0, 0, this._getWidth(), this._getHeight());
}