Turret armor & magic resist fluctuation

Hello! I just discovered a bug concerning the OUTER turrets. Their armor and magic resists are fluctuating synchrone every half second. I think it started from 10. So for example: from 200 to 210 and back to 200 and so on. It changes every minute. So im in the 14th minute and the amout is 28. Im pretty sure this is a bug, a pretty funny one in addition :P Hope I was helping!

Update: After the outer tower falls, the next one is having the same bug but from the begining.