Maintenance for the week of December 8:
• [COMPLETE] ESO Store and Account System for maintenance – December 10, 9:00AM EST (14:00 UTC) - 12:00PM EST (17:00 UTC)
Happens to me about 85% of the time I use a wayshrine. I've found that it isn't even limited to zone changes; it has happened when I leave the bank, for example.