Depending on where I build it, the bottom dropper of a standard dropper/hopper t-flipflop randomly seems to be having issues receiving power from either the block right next to it, or from dust directly on top of the top dropper.

Normally, it works perfectly fine in most locations, but in certain spots, the exact same configuration refuses to work. When that situation occurs, the t-flipflop can turn itself off, but not back on again. If additional redstone wire is placed, wrapping around to directly point at the lower-dropper, THEN it will work, but that shouldn't be necessary. And isn't for other copies of the same circuit, built elsewhere.

I've attached a save file which shows the bug happening. The circuit configuration works perfectly for the large redstone Lights Out game on this map (after moving it's location a few times till it worked right), but when the individual game-tile's circuits are built in certain locations, they do not work. Player should spawn near a broken one, which is featured in the image I've also attached. The redstone dust on the grass in this image was added to troubleshoot this bug, breaking it and then toggling the circuit should show the bug in action.

You can also /clone the circuits to different locations, and see the bug happen half the time, tho you may need to replace some dust, as it sometimes falls off upon pasting. I'm not sure if the cardinal direction the circuit is facing matters, since it happens seemingly at random.. I also have an example of the bug on display near spawn on my vanilla server hosted at nikserver.ddns.net, which shows it also happens in multiplayer/vanilla java servers.

Added a couple better examples to the save file, as well as a couple more screenshots, which show the various ways to make it, the ones with lights on work, the others don't.. But there are examples built of each design working/not-working, only difference being where they were built.