Hello Ricardo,
Thank you for your question about Slam-It.
I tried to reproduce this. If I ADD a new bid, there is a chance the spinning dial will hang, but the snipe is always added. (Refreshing your dashboard page should show this.)
But if I UPDATE a bid, it always works.
Please click the link below to enable video recording. This will let me see the issue and try to reproduce it exactly the way you see it.
https://bidslammer.com/enable_video/
bidslammer