There's just something I don't like about the word "bug". It suggests a condition of the software, not a condition of the developer. Maybe it's the full phrase "caused a ... bug". As if the bug wasn't present until the condition occurred. Unless that condition is actually altering the commands in the software, the bug was already there. I could even talk about what "weird" means in this context. It's not a poke at you - I heard phrases like "caused a weird bug" all the time in our industry. In generally, and especially in situations involving safety, it's important we not engage in minimization, but call it was it is: a flaw, where conditions in the operating environment weren't properly considered.