Default [Help] attachment failure in Gmail android app

Hi friends
I am facing a unique problem I don't know whether anyone has encountered such problem
When I try to download Jpeg attachment by clicking on the link the page wents black or some time it downloads the Jpeg but when I try to open it it reads, " could not load image,"
It usually happens with images which are more then 500 kb in size
I tried latest update or i tried old version of gmail but the problem is same
Please help me it's really annoying


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