Caused by: java.lang.IllegalArgumentException: Can't triangulate less than 3 points

[theapache64]

When I try to set color generator dynamically,

binding.trvBg.drawable.setColorGenerator(RandomColorGenerator())

app crashes with below stacktrace

java.lang.RuntimeException: An error occurred while executing doInBackground()
        at android.os.AsyncTask$3.done(AsyncTask.java:354)
        at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
        at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
        at java.util.concurrent.FutureTask.run(FutureTask.java:271)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:764)
     Caused by: java.lang.IllegalArgumentException: Can't triangulate less than 3 points
        at com.manolovn.trianglify.util.Preconditions.checkArgument(Preconditions.java:25)
        at com.manolovn.trianglify.triangulator.DelaunayTriangulator.triangulate(DelaunayTriangulator.java:27)
        at com.manolovn.trianglify.TrianglifyDrawable$TriangulateAsyncTask.doInBackground(TrianglifyDrawable.java:127)
        at com.manolovn.trianglify.TrianglifyDrawable$TriangulateAsyncTask.doInBackground(TrianglifyDrawable.java:118)