It works with your given nine patch assets but does not work with my nine patch image.

[AhmadIzaz]

This is the code I am trying out
NinePatchImage( hideLines: true, imageProvider: AssetImage(Assets.images.crm2.myasset9.path), child: Text(e.text.toString()))

When I am doing with your asset image the 'bubble_blue.9.png' it somehow works but with blurred corners but atleast I can see it.
Now when I try with my .9.png asset. my assets wont even be visisble when I run the same code.
Below is my asset

[AhmadIzaz]

and this comes in the logs as well

════════ Exception caught by rendering library ═════════════════════════════════
centerSlice was used with a BoxFit that does not guarantee that the image is fully visible.
'package:flutter/src/painting/decoration_image.dart':
Failed assertion: line 552 pos 12: 'sourceSize == inputSize'
The relevant error-causing widget was: