Sometimes, placing Redstone torches at the side of blocks as a NOT NOT (This is how I make repeaters since they have not been implemented yet), will result in the first NOT gate being frozen on, with input power.
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This is similar to, if not the same as, MCPE-11871. In your screenshot, the redstone wire placed behind the first NOT gate looks powered by a strongly-powered block below it. When a line of dust (not a dot) is powered that way, it fails to power any horizontally adjacent blocks (the white wool with the first torch attached in your case) except for another dust placed next to it. I guess you can work around the glitch by removing the leftmost dust to turn the dust above the torch into a dot.
This is similar to, if not the same as, MCPE-11871. In your screenshot, the redstone wire placed behind the first NOT gate looks powered by a strongly-powered block below it. When a line of dust (not a dot) is powered that way, it fails to power any horizontally adjacent blocks (the white wool with the first torch attached in your case) except for another dust placed next to it. I guess you can work around the glitch by removing the leftmost dust to turn the dust above the torch into a dot.