Problem:

Potion/Effect particles show up, even though my potion has particles turned off. The particles didn't started immediately, but after another potion/effect was applied on me, in this case strength.

I gave myself strength (no particles), and then went in range of a strength beacon, which has of course particles. When I went out of range, the beacon strength went out after 15 seconds and the old strength did show up with particles.

How to recreate:

• Give yourself a potion effect without particles. For example with this command: /effect give @p strength 1000000 20 true. You should see no particles.
• Give yourself a shorter lasting potion of the same effect, with particles, just a regular potion for example, and let it run out.
• Because of this bug, you will keep getting particles