I don’t remember changing anything on missiles or chaffs recently, but it’s possible something caused their behavior to change indirectly.
Can you elaborate on where you think the delays aren’t working ? Do you think it’s an issue with the missiles or the chaffs ?
Looking at the video, in both cases you pressed chaff the moment the missile was about to reach you. There’s a delay of one second with chaff activation, and it seems to me it was already too late, the missile was already on you.
Edit: I increased missiles thrust / accelerations quite a bit in the last patch, so maybe everything is functionning correctly, but the activation timings are more difficult. I can look into rebalancing them.