Niama3310,
I do not have any problem with Lumia 640XL and with Lumia 650.
For me, you efforts have been very successful. Thanks once more.
p.s. I do not believe that MS will ever come out with a fix. No more money invested on Windows Phone : this is a clear strategy within MS.
What a pity... but that's life.
There have been, there are and there will be dozen of good products that for one reason or another have not been accepted by the market.