Opening Bandicot starts one engine, not two
When the engine took a few seconds to wake up, the window started a second one and they fought for your chats. Now it waits for the first.
Opening Bandicot after a long day could feel slow, show a stray error and leave helpers waiting. The window gave its engine about two seconds to wake, then started another one. The two then fought over the same chats, and the one that had already gathered your unfinished work stepped aside.
Now the window remembers the engine it started and waits for it while it is still waking. A new one is started only if the first has actually stopped.