Bugs_Internet Explorer 11 (FE bugs with displaying elements)

According to supported browsers on Bootstrap 4: IE 10-11 and Edge. Screenshot_2 - Edge 16 browser, in the main_navbar is present scrollbar Screenshot_3: IE11 browser

1. in the main_navbar is present scroll bar
2. cropping TYPO3 logo
3. the incorrect height of the main menu (should be 80 px) 4,5. missing Search and User account icons Screenshot_4 - missing arrows on the News and Events list on the Homepage Screenshot_5 - body text element is misaligned Screenshot_6 - placeholder text is missing Screenshot_7 - login fields should be aligned by center; missing user icon