Hey guys,

I've run into this issue where if I delete a couple of particles from a
cloud it sometimes makes the whole cloud invisible.
It's a cloud with a couple thousand particles in it that have strands of
varying lengths. The particles and strands are generated by an unsimulated
ice-tree.

When this happens the cloud is completely invisible, but *you can still
select the remaining particles by pressing Ctrl+A.* And when you focus on
them then by pressing F the camera doesn't focus on {0,0,0} but instead on
the exact spot where those particles should be.

*The deletion happens at the very very end of the ice tree. Nothing else
gets executed after it*.

How those particles are deleted doesn't seem to matter either.
I have the same issues occuring if I delete based on strandlength, a random
value or just simply ID.
Some deletions simply cause the cloud to disappear.

*Here are some examples:*
If I delete all particles with an ID less than 5500 everything is working
fine.
If I delete all particles with an ID less than 5540 the cloud disappears.
If I delete all particles with an ID less than 5610 everything is working
fine.

Let's say I generate a random value between 0 and 1.
If I delete all particles with a random value less than 0,834 the cloud
disappears.
If I delete all particles with a random value less than 0,720 everything is
working fine.
If I delete all particles with a random value less than 0,69 the cloud
disappears.
If I delete all particles with a random value less than 0,36 everything is
working fine.
If I delete all particles with a random value less than 0,21 the cloud
disappears.

It appears to be pretty much completely random if the cloud disappears or
works fine.

Right now the work around is to set the particles I don't want to position
{0, 100000, 0} instead of deleting them which is okay for a quick
production fix, but ultimately a really dirty solution.

I've already wasted a good part of the day poking at this problem and
haven't been able to figure out the source of this what do I call it? A bug?

If you've encountered this before or have a hunch what might be causing
this, then please let me know.

Thanks a lot guys.

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