Have two pipelines that are used with the same srb: setPipeline(a); setShaderResources(s); draw setPipeline(b); setShaderResources(s); draw If this is repeated each frame, then on the second an subsequent frames the uniforms for the program behind pipeline b will not be set, i.e. the glUniformxx calls will be missing. This is due to the pipeline's own srb tracking (currentSrb/currentSrbgeneration) works: in the second frame setShaderResources(s) for pipeline b will do nothing, since the command buffer's tracked current srb is already s, and also b's currentSrb is already s. The problem remains hidden usually because Quick or Quick 3D does not generate sequences like the above (same srb with different pipelines). Pick-to: 6.9 6.8 Change-Id: I56b962f0ba12370e0de7c87fb7178a0b9e4b0178 Reviewed-by: Andy Nichols <andy.nichols@qt.io>