Scroll to date after changing view preset breaks horizontal scroll

[pmiklashevych]

https://www.bryntum.com/forum/viewtopic.php?p=81210#p81210

Reproduced in SchedulerPro module/umd bundles
Failed to reproduce in simple Scheduler and SchedulerPro (ES6)

To reproduce modify SchedulerPro/examples/grouping/app.js

import '../_shared/shared.js'; // not required, our example styling etc.
import '../../lib/Scheduler/column/ResourceInfoColumn.js';
import SchedulerPro from '../../lib/SchedulerPro/view/SchedulerPro.js';

const schedulerPro = new SchedulerPro({
    project : {
        autoLoad  : true,
        transport : {
            load : {
                url : './data/data.json'
            }
        }
    },

    resourceImagePath : '../_shared/images/users/',
    appendTo          : 'container',
    startDate         : new Date(2000, 0, 1),
    endDate           : new Date(2099, 11, 31),
    viewPreset        : 'hourAndDay',

    columns : [
        {
            type           : 'resourceInfo',
            text           : 'Name',
            showEventCount : true,
            width          : 220,
            validNames     : null
        }
    ]
});

const timeout = ms => new Promise(resolve => setTimeout(resolve, ms));

const setTimeline = async(date) => {
    console.log('scrolling to date ' + date.toString());
    await schedulerPro.scrollToDate(date, {
        block : 'start'
    });
};

const initializeTimelines = async() => {
    console.log('Setting weekAndMonth');
    schedulerPro.viewPreset = 'weekAndMonth';
    await setTimeline(new Date(2020, 12, 29));

    await timeout(3000);

    console.log('Setting dayAndWeek');
    schedulerPro.viewPreset = 'dayAndWeek';
    await setTimeline(new Date(2020, 12, 1));
};

initializeTimelines();

Build scheduler pro and examples
Go to http://lh/bryntum-suite/schedulerpro/examples/grouping/index.module.html
Wait for the log:

Setting weekAndMonth
scrolling to date Fri Jan 29 2021 00:00:00 GMT+0300 (GMT+03:00)
Setting dayAndWeek
scrolling to date Fri Jan 01 2021 00:00:00 GMT+0300 (GMT+03:00)

See the timeline shows 2021. Drag the scroller a bit to the right. See timeline jumps to 2014.

[pmiklashevych]

This issue is not reproducible in 4.1.0-beta-2 release