1. set up a dispenser
2. put arrows in dispenser.
3. fire it at you.
4. you don't get the effect.
i tested it in the java edition and I got the effects.
harming somehow does work and I haven't tested healing yet.
MCPE-23166
when you get hit by a tipped arrow from a dispenser you won't get the effect
Resolved
Fixed
4
(Unassigned)
74238
Confirmed
Tablet - iOS - iPad Air 2
iOS 10.3.2
1.1.2.50, 1.1.3.1, 1.2.0.11, 1.2.10.2
1.2.11.4
Retrieved
Confirmed to be affecting 1.1.2. No status effects can be given by tipped arrows shot by dispensers.
Instant Damage and Instant Health do work, probably because they aren't really status effects.
Test world attached.