Are your tarinai shitheads ? If they are i think i know what is happening, basically tarinai don't have any accessory by default, so they acted as an accesoryless shithead trying to stole an accessory from another yukkuri but not being able to have an accessory even if they stole an accessory the accessory just disappear making them search and destroy accessory forever, if you want to stop it try to put trash near the tarinari and see if after it take an accessory (if it take it) it will stop to destroy accessory
Trash? I don't see that in any of the drop-down menus nor categories. Maybe I'm missing something? This is the version linked in the OP-the Hiatus version.
Yeah, the tarinai all seem to be shitheads, too. They'll slither up to another yukkuri (always Marisas IME) and knock into them. Then the accessory disappears. The tarinai doesn't have it, but selecting Accessory will restore one to the affected yukkuri. I hadn't thought to try removing a shithead normal yukkuri's accessory and see if they'd try to steal one.