I've had off & on dead spot issues with most of our 'pads' but mostly that the phones can easily get knocked while on the bedside tables and while askew, of course, charging stops. Sometimes when a bad spot seems almost total, I restart the phone and all's OK - as if the dead spot at times may be phone software related. The worst for this was our original Belkin 'Boost-Up' pad and the restart of phone was needed there frequently.
I just picked up ( Amazon) two Anker Power-wave 7.5 'stands' which orient the phone either landscape or portrait and should eliminate phones getting knocked off center. Seems to be a good build quality and after one night, all seems well ( but I've said that before so I'll work them for a month so....) The price was right in this case as I had ordered two in a special 'BOGO' offering pre Black Friday through Amazon.ca Prime. So for about $50 Cdn getting 2 ( one black for me, one white for my wife) was a no-brainer. On the same special I also got two TP link WR850 Range extenders unbelievably cheap. $30 for 2!..I already have one in use which had cost 4X what I paid on Amazon.ca last Nov. First one cost me $125 Bdos at home ($62.50 US) I'm right now in Canada to ( among other things) collect my Amazon packages at my mail-box at UPS...