Android App shows macroblocking on screen with Air SDK 17.0

We released an Android Game with Air SDK 17.0.

Some players reported a bug :  lots of macroblocking on theirs screens.

Theirs devices are ASUS MeMO Pad 7 (ME572C)  and Fonepad 7 LTE (FE375CL).

Devices info ：

(ME572C) Buildnumber：KVT49L.JP_epad-11.8.3.31-20150126 release-keys044000309_201407240016

(FE375CL) Buildnumber：12.12.1.41

We asked help for ASUS services,and they replied :

From the OpenGL trace, it showed that this app has invalid operation while using these two API call, glCopyTexSubImage2D and glBlitFramebuffer.

App info:

SDK version: Air SDK 17.0

RenderMode :

Waiting for your help,thanks !