[4.2.0.19][Xperia 10II] No Internet connection on Mobile Data when leaving WiFi if `Data access point`: `Protocol` is set to `Dual` (default)

Bug Reports
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18

I have the same problem as xidira. Also using XA2 but with 4.2.0.21.

It looks like the problem is connected to Network broken for some Android Apps in 4.2.0.19 - #10 by luddwig27
In some cases it’s even the same problem.

But I have no clue how to fix the problem for wifi!?