This is not a feature, this is a MAJOR BUG and a real SHAME for TP-LINK. You can not call your DECO-units "routers" until this bug is fixed. Simply intolerable.

@TP-Link When will this unacceptable bug finally be solved ? Even in your most recent beta-firmware (1.6.0) this is again not mentioned at all while this is and remains a huge bug in your deco system...