on_unit_destroyed is called repeatedly with identical unit_tags

[ericbroda]

"on_unit_destroyed" gets called with identical unit_tags repeatedly. This usually happens later in the game (7-10+ minutes into the game).

[ericbroda]

This is quite hard to reproduce, however, one thing that looks unusual is that the unit tags that get notified of being destroyed do not have a unit tag that was originally created by the bot.