[Android] Automatic keyboard switch for no reason

[maxim-gapeenko-idf]

When I enter any letter into a field with a mask on android, any following digit inputs will trigger keyboard to change from digits to letters. Only after entering few digits in a row keyboard changes will stop occuring.

Here is the video of the bug: https://vimeo.com/582486275.

Used mask:

MaskTextInputFormatter(
    mask: '#### #### #### #### #### ####',
    filter: {'#': RegExp(r'[A-Za-z0-9]')},
);

Android 9 HTC U 11
Keyboard: Gboard.

But it seems the bug can be reproduced on any android device.

[maxim-gapeenko-idf]

Might have to do something with Flutter instead of your library, but leaving here so that you can investigate yourself further.

[mflesh1]

This is happening to me as well, the format I am using is:

MaskTextInputFormatter phoneFormatter = new MaskTextInputFormatter(mask: '(###) ###-####', filter: { "#": RegExp(r'[0-9]') }); keyboardType: TextInputType.numberWithOptions(signed: true, decimal: false)

I can recreate it consistently by typing 1234 and when I type 4 the keyboard switches, if I switch back to the number keyboard and type any other character but 4 it works.

[AndreyWV]

Same issue. My mask:

MaskTextInputFormatter(
  mask: 'T NNN TT NN',
  filter: {
    'T': RegExp(r'[АВЕКМНОРСТУХ]'),
    'N': RegExp(r'[0-9]'),
  },
)

Keyboard switched after typing second symbol (first number N). Android 11 Pixel 2 emulator. Gboard.

[thalesvinicius26]

Same issue here. Is there any workaround for this?

My mask: MaskTextInputFormatter( mask: '#######', filter: {"#": RegExp(r'[A-Z0-9]')} );

[Ticunas]

Same here,

When I change the keyboard to only show numbers and press any key, the keyboard change to default (letters).

var userFormatter = MaskTextInputFormatter(mask: '##.###.###');

TextField(
              textInputAction: TextInputAction.next,
              decoration: InputDecoration(
                border: OutlineInputBorder(),
                labelText: 'User',
              ),
              inputFormatters: [userFormatter],
              textAlign: TextAlign.center,
            ),

[RusKryzhanovskiy]

Is there any update?

[pongloongyeat]

Could be linked to flutter/flutter#122721?