Error 307: Booted from server - related to alchemy?

For the past 3 days, I have been collecting alchemy ingredients and combining to learn the recipes. Sometimes I look in guild merchants while doing this, but all three times I have done anything alchemy related I got this message within 10 minutes of starting the activity.

I have played this game for about 3 weeks, and never get the message (and kicked off the game for 15 minutes) unless I am doing something alchemy related.

I am running skyshards, mage skill books, and TTC mods only.

Is this a known issue? I saw a thread on the eso forums where a few people were complaining about this as well, and several of them also noticed a connection to alchemy.

Do the devs read this forum?