Corrupted qml rendering on some Android PowerVR devices after the app is killed

On devices using PowerVR GPU (tested on Redmi 9A and Moto e7),  there is a bug with the qml UI being corrupted, after the app get killed.

To reproduce it, I used a basic qml app with this code:

import QtQuick
import QtQuick.Controls

ApplicationWindow {
  visible: true

  Rectangle {
    color: 'blue'
    anchors.left: parent.left
    anchors.right: parent.right
    anchors.bottom: parent.bottom
    height: 200
    radius: 24
  }
}

Then I run on my phone, exit the application (with the middle button in android bar), then kill it (right button and I swipe up the app).

After this, I reopen the application a few times, and at some point the UI becomes scrambled. I attach a screenshot of what I see. The actual effect seems to vary, and sometimes it is hard to see. I used the rounded rectangle since that is where it seems to fail the most, with this red/green texture.

If I clear the cache the application works again until I kill it again.

A workaround is to disable the shader cache.