Expected Results:
Projectiles, such as any other entity should emit water splash particles when entering the water.
Actual Results:
Projectiles do not emit water splash particles when entering the water.
Attachments
Comments 3

This bug was introduced in 1.20.40, but since 1.20.41 came out today which is the same day I'm reporting this, I was only able to put the most recent one as the affected version.
Water splash particles worked correctly on previous versions, and they would appear as soon as the projectile entered the water.
I just added more footage. It's from 1.20.31 on mobile, since this was the only way I could downgrade. In this new video, particles work as they should. I suspect the issue might be related to MCPE-175528 since both bugs were introduced during the development of 1.20.40, and they both involve water splash particles.