Bots and zoning

Today (Thursday, 15 September) every time I zone, my bots lose 50% of their HP. Which drives the healer(s) nuts because they then burn all their mana healing the other bots up. Painful when having to travel more than a single zone.

Note: if this is old, standard behavior and I am just now noticing this, please excuse me. My wife is forever complaining how unobservant I am ("What do you mean, you didn't know I got my hair cut?")

I will look into this, I know they act dumb on zoning but this in new. thank you.