Rescue countdown triggering even while undetected

[NinthAria]

This has happened to me a few times now during the rescue stages of bounties: Once I stealth kill the first guard in the patrol, the bomb countdown starts despite the rest of the Grineer still being unalerted. Not sure if this is a bug or just an oversight, but either way it's very frustrating--especially on higher-level bounties--and feels a little misleading, as Lotus clearly says the countdown is supposed to start once you're noticed.

[Eienlanzer]

I think it is a bug as it always happens regardless of how we take the guards out.