I don't use any addons that open mail, I only have installed bongos for bars; xp, action, bags, and so on.
That said, it's been happening all day, I don't know if it is because of the recent crashes of the server.
https://gyazo.com/86cc7816e23101a3341a71495ac463b9
Today I might have lost like 2 gold in total, and it was just from minor AH sellings, just a few silvers. But I don't want it to happen if in the future I sell something big. If this was the case, can I ask to have my gold back or something?