When using Addons that contain the use of execute with all its parameters, the game lags a bit and then everything returns to normal. However, when leaving and re-entering the world, the bug returns.

Next I will show what the error looks like using an addon that grants advancements very similar to Java Edition.

I also attached two images and a video, which explain how the error behaves.

In the following link it takes you to the captures:

Bugs