ShowTrayIcons / HideTrayIcons tweaks affect this. ShowTrayIcons is included in the default preset and causes the notification area (SysTray) icons to be visible at all times. So to get the arrow / grouping / hiding back either apply HideTrayIcons tweak or simply fix it manually by using the checkbox in Settings -> Personalization -> Taskbar -> Select which icons appear on the taskbar -> Always show all icons in the notification area
This seem to be a duplicate of #219 and partially #282.
ShowTrayIcons/HideTrayIconstweaks affect this.ShowTrayIconsis included in the default preset and causes the notification area (SysTray) icons to be visible at all times. So to get the arrow / grouping / hiding back either applyHideTrayIconstweak or simply fix it manually by using the checkbox in Settings -> Personalization -> Taskbar -> Select which icons appear on the taskbar -> Always show all icons in the notification areaThis seem to be a duplicate of #219 and partially #282.