Npot texture:non-power-of-two Texture.
Rectangle Texture:non-square (Height! = wdith)
When testing the SAMSUMG Galaxy S4, it was found that rectangle texture support was not good, although the creation was successful, but the drawing was problematic.
A similar situation occurs with different modules: the color sampled by the texture is (0,0,0,1). After the elimination of all possible runtime problems, try to change the texture of the format without fruit, and try to change the size of the next, unexpectedly good. I rub ...
The Galaxy Note10 2014 and LG Nexus 5 Do not have this problem, of course there are other issues.
Android a variety of different manufacturers of equipment gles really is a variety of problems in the endless AH. It feels good to be iOS.
Of course this may be a superficial reason, because there is no separate test case. It is possible that complex glcall exposed driver bugs in complex scenarios.