I have been affected by this and so have alot of other people. Farm animals and hostile mobs sometimes go invisible without warning the chunk has to be reloaded for it to reappear. As on sees in the survival sektion on the Forums even armor stands are affected by this. It is quite annoying being blown up by a invisible creeper standing in front of you while flying over lava...
Only step we can suggest is play till it happens. I had an instant about a day or two ago with a zombie. Killed me out of the blue so I hit /back, died again. hit /back, died again. hit /back, you get the idea. 16 times I died before the zombie who had snatched my armor and my fire sword appeared. This is a bit of a pain for someone who likes to keep 30 xp minimum for repair and enchant. It's my, and a few others, assumption that it has a lot to do with 1.10 compatibility as it didn't start to occur until after the update came out and we became compatible.
Not happened to me yet, but I don't exactly go exploring too much. Will keep my eye out for this issue.
It seems like this is a client side issue with 1.9+ players. Invisible mobs can be killed using a bow whether you can see them or not. Melee weapons do nothing to them. Hope this helps out!
Just want to make it known that this issue occurred even prior to 1.10 compatibility being introduced. Other inconsistencies include boats, pigs, and horses. I'd suggest playing on a 1.8 client for the best experience.