When powered by repeater the sticky piston doesn't extend ( see third photo) when repeater destroyed and powered directly by a redstone torch it works (second photo) when then powered by repeater works normally (first photo) when I quit minecraft I have to reconfigure all the repeaters and Pistons but this repeater works and then I have to find anew way but now it doesn't work at all.
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It's hard to tell exactly from your photos, but is the piston not extending because it was previously blocked? (If so this could be similar to bug MCPE-15606)
It's hard to tell exactly from your photos, but is the piston not extending because it was previously blocked? (If so this could be similar to bug MCPE-15606)
The torch powering the piston is actually a bug. See MCPE-15195. Would be helpful to have a world download or more screenshots to understand more of what is going on.