I successfully installed Powerline XWNB5201 and XWNB5001 with extended wifi connection working properly with both iPad and Android phone. I then had to change the router and re-installed the Powerline which was also successful with a good extended wifi signal. However, whereas on the first installation the automatic changeover from router signal to the Powerline signal worked perfectly with both devices, on the new installation the Android phone changed over automatically but the iPad fails to do so by remaining locked to the original signal and can only be changed by powering off. I realise it is more than likely an iPad problem but perhaps someone has come across this before and found a solution?

Your solution worked, thank you. The process of doing a factory reset twice fixed it.

iPad fails to automatically change from router to Powerline wifi