Maintenance for the week of March 3:
• PC/Mac: No maintenance – March 3
• NA megaservers for maintenance – March 5, 4:00AM EST (9:00 UTC) - 11:00AM EST (16:00 UTC)
• EU megaservers for maintenance – March 5, 9:00 UTC (4:00AM EST) - 16:00 UTC (11:00AM EST)
• ESO Store and Account System for maintenance – March 6, 6:00AM EST (11:00 UTC) - 4:00PM EST (21:00 UTC)
I purchased 2 upgrades for my Bank and for my bags. My bags are still showing 80 but my bank is back down to 60. My bank was full, so not only did I lose my 20 slots, I lost 20 (stacks of) items.
Just wanted to add this happened to me too. Though in my case it was only the first upgrade that disappeared, resetting my bank to 60/60 and with the last items I'd put in their disappearing. Have submitted a ticket but .. seems to be a worrying bug.