问视频直播sdk，调用停止摄像头预览的函数报错？

SDK Version = 6.9.8341

[TXLivePush stopPreview]

设用后出现大量报错

[I][monitor_api.cpp, UnInit, 220]:liteav::monitor UnInit

E/renderer (422): glDrawElements(static_cast<GLenum>(_nextState->primitiveType), count, static_cast<GLenum>(nextIndexBuffer->getFormat()), (GLvoid *)(base * nextIndexBuffer->getBytesPerIndex())); GL error 0x502: GL_INVALID_OPERATION:draw

E/renderer (422): glDrawElements(static_cast<GLenum>(_nextState->primitiveType), count, static_cast<GLenum>(nextIndexBuffer->getFormat()), (GLvoid *)(base * nextIndexBuffer->getBytesPerIndex())); GL error 0x502: GL_INVALID_OPERATION:draw