Start time: Saturday 30/03/2024 03:43 PM
Shiggi's bid is at 04:41 PM as of your update comment. I think you should recheck the time.
I also acknowledged about the 15 mins rule and it didn't applicable here. The moment the auction ended your timer in your original post also turn 00:00 but I think you didn't check it as well.
After I recheck your post about Shiggi's bid, even when the time does appear in your screenshot, it's your responsibility to keep the auction post up-to-date in the forum, which wasn't the case here. Your update comment is about 1 hour late compare to the end time of the auction, hence I said it's invalid.