keyboard shortcuts panel toggle button not appearing on Google Chrome

[MarkKD]

react-dates version
react-dates@21.8.3

Describe the bug
On the Google Chrome browser if the DayPicker has the withPortal set to true and the orientation set to vertical when the DayPicker is opened on a tablet-sized screen the keyboard shortcuts panel toggle button (right bottom corner triangle with a question mark) and the shortcuts panel will not appear and both are completely removed from the DOM.

Once this bug has occurred and the keyboard shortcuts button and panel will no longer appear even with page reloads, changing to desktop screen size, or clearing all storage types and cookies.

This appears to be similar to this issue raised in 2019 #1706

Source code (including props configuration)
Steps to reproduce the behavior:

 <DayPickerRangeController
            numberOfMonths={2}
            startDate={startDate}
            endDate={endDate}
            focusedInput={focusedInput}
            onFocusChange={(focused) => setFocusedInput(focused || 'endDate')}
            initialVisibleMonth={null}
            onDatesChange={handleDatesChange}
            orientation={ 'vertical' }
            withPortal={true}
            minimumNights={0}
          />

If you have custom methods that you are passing into a react-dates component, e.g. onDatesChange, onFocusChange, renderMonth, isDayBlocked, etc., please include the source for those as well.

Desktop (please complete the following information):

• OS: [MAC OS, Windows]
• Browser [chrome]

Is the issue reproducible in Storybook?
Please link to the relevant storybook example