On 2 different PCs I have an issue when deleting price alerts in beta. I click the cross to delete the alerts from the bottom panel then my page goes blank. I then have to refresh the page. This happens every time I delete a price alert this way.
I will DM in order to discuss your case further.
Mine tend to be visible even after deleting and/or amending them when I go into the stock but don’t see them when I actually look in the price alert tab. Has been going on for a while now and doesn’t seem to have been rectified.