Stronger effects remove weaker effects from the player, when they should be tracked so that they keep applying after the stronger effect expires.

How to reproduce:
1. Consume a Potion of Speed I.
2. Enter a Beacon's zone providing Speed II, or consume a Potion of Speed II.
3. Exit the Beacon's zone and wait 17s, or wait 1:30 for the stronger potion to expire.

What I observed: 
The stronger effect completely removes he weaker effect when it applies.
The weaker effect will not persist.

What I expected: 
The weaker effect to be hidden in the GUI, but still be tracked by the game so that when the stronger effect expires the weaker will continue.