Attack Speed Bug on Devourer/Sated Devourer Enchant

I've played a few games now with the devourer enchant in the jungle and I noticed that sometimes I will lose the attack speed from the item. I haven't figured out how to "trip" the bug (idk if thats the right word) but it seems to be almost random. I will just be auto attacking and all of a sudden lose 50% attack speed for about three to five seconds then it comes right back. Also it has happened on and and also and . I have not used or this patch yet.