When given a potion effect its icon in the top right of your screen is pink and if you look at the potion effects menue most of the menue is pink as well as the potion effect in the menue.
MCPE-63149
Pink potion effects
Resolved
Fixed
1
(Unassigned)
389750
Community Consensus
Xbox
Xbox
1.16.0.58 Beta, 1.15.0.51 Beta, 1.14.60 Hotfix
1.16.20.54 Beta
Retrieved
It also affects 1.14.60 but it´s only on the icon. On the effects menu it is fine