Here's what Bitget support had to say.... note their line "At that time, the price fluctuated greatly, so it was normal for the closing price to slip."..... I would be ok with a small bit of slippage but when I set my stop loss to $50 and I lose $150 I don't think $100 of slippage is acceptable!!

Dear valued customer,
 
Greetings from Bitget.
 
PIUSDT long，quantity：6853
stop loss：0.9251
close price：0.9191，close time：2025/3/25  02:48:23 UTC+9
average entry price：0.9307
realized pnl：（close price- average entry price）*quantity=-79.1372
trading fee：-7.6065（open+close）
funding fee：-0.32243365
net profit：realized pnl+trading fee+funding fee=-87.0663
 
PIUSDT long，quantity：6026
stop loss：0.9389
close price：0.9231，close time：2025/3/24  22:09:39 UTC+9
average entry price：0.9474
realized pnl：（close price- average entry price）*quantity=-146.4318
trading fee：-4.4793（open+close）
net profit：realized pnl+trading fee=-150.9112
 
The above two orders were successfully closed after reaching the stop loss price.
The system triggers the stop loss price before closing the position. At that time, the price fluctuated greatly, so it was normal for the closing price to slip.
If you want to close the position at a specified price, you can set a limit order.