I'm trying to create a T-Flip Flop to power my "Monster Masher" mob grinder, with a Minecart timer mechanism. The TFF I'm using is the Cauldron/Comparator model, and it works great, at least until I hook it up to the timer.
After that, with an empty cart, it either freezes and crashes immediately after touching the Detector rail, or takes several minutes. If a mob, such as Mr Sheep in the second screenshot, wanders into the cart, it will crash immediately the second it touches the Detector rail.
To Reproduce:
1. Build a Cauldron/Comparator TFF
2. Hook it up to a loop of rails and set a minecart in motion, with a Detector rail attached to the TFF
3. Laugh maniacally as your Monster Masher finally works
4. Game will crash after aforementioned delays
Thank you for your report. This issue was, however, submitted earlier as MCPE-14805. Please perform a search next time to make sure your bug hasn't already been reported. The parent issue can easily be found by searching for "mcpe unresolved cauldron".