I have tested a Router from a Friend for 3 Days the Pocket Router Shared Wifi 3 It was working perfect Turn on Turn off from standby Switch between the 2 routers Printing and scanning everything was not a Problem in this 3 Days when test it.
From all Device Mac mini Computer I Pad Android phone and Windows PC attached the Test and Configurations Page and a Connection screenshots of Printer > Router So I am 100 percent sure that the problem does not come from my Device.
It is a problem of the TP Link mr 200!