Placeholder is not removed

[truedl]

When I'm writing the username the placeholder is not removed. See the screenshot below

Code:

const username_input = new PIXI.TextInput({
        input: {
            fontSize: '38px',
            padding: '14px',
            width: '400px',
            color: '#26272E'
        }, 
        box: {
            default: {fill: 0xFFFFFF, rounded: 12, stroke: {color: 0xC8C8C8, width: 3}}
        }
    });
username_input.x = app.screen.width/2-200;
username_input.y = app.screen.height/2;

username_input.placeholder = 'Username'

app.stage.addChild(username_input);

[Mwni]

Are you on a mobile device?

[truedl]

Nope. Desktop PC Firefox browser.

[Mwni]

Cannot reproduce this bug.
Can you confirm the input event is actually firing?
A jsfiddle or something would be greatly appreciated.