This has been happening since eBay made a major change in how bids are accepted. That didnt affect us though because of how we snipe, but it's obviously effecting eBay.

Snipes at high traffic periods from 5:30-8:30pm should use slightly more than 10 seconds.
We'll report back when it's safe to lower your lead times. Or if a 1 in 40 chance of having a snipe be late is acceptable feel free to stick with your normal lead time.
Thank you