Particle Systems flicker when partly behind transparent objects

I am having a difficult time to create particle systems in Reality Composer Pro (visionOS beta 3). They tend to start to flicker and all particles disappear and reappear in semi-random intervals.

I can clearly see that happening with one effect that I put inside a small box consisting of 4 transparent walls that has a solid floor. When I change the view angle the particle system starts to flicker when viewed from below its emission height.

I tried all combinations of particle rendering: billboard->free, additive etc and it does not change anything. I am using the default particle image.

Any help appreciated

Particle Systems flicker when partly behind transparent objects
 
 
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