QSpinBox does not respond correctly to Android keyboard

When using QSpinBox (the Widgets kind), the Android keyboard behaves strangely. This can be reproduced on a minimal example (project attached). The issue was observed on a Samsung Galaxy Tab A8, running Android 14, in both landscape and portrait mode. It was also observed on a Motorola Razr 40 Ultra, running Android 14, but only when using the phone in landscape mode.

The QSpinBox where this was observed as been configured to accept a large number, so as to not let the automatic number validation interfere with the testing.

What did you do:

• Open the project application on the device
• Tap the number field to start editing text, the on-screen keyboard appears
• Tap some numbers, and try to use backspace
• Try tapping somewhere inside the number-field to change where the text-insertion marker is placed.
• Close the editing session by pressing the button with the "Done" smymbol on the on-screen keyboard.

What did you expect to happen?
I expect to get immediate feedback when I press numbers, and see them show up on screen. I expect the backspace to remove numbers immediately, and see the result in real-time. I expect the text-insertion-marker to move when I press inside the number-field.

What happened:
When entering text, the number-field does not update at all. No new numbers appear in the number-field. When pressing backspace, there is no visible change. When pressing inside the number-field, nothing happens, there is no response.

When pressing the Done button, the on-screen keyboard closes and immediately opens back up with no change to the number-field.

Under some circumstances, it seems the changes will be flushed all at once. I was not able to figure out the exact steps to reproduce this, but seems to be related to switching to another application and then going back to the example.