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[Mantaflow] the number of particles increases over time
Confirmed, NormalPublicBUG

Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: AMD Radeon HD 7560D ATI Technologies Inc. 4.5.13399 Core Profile Context 15.201.1151.1008

Blender Version
Broken: version: 2.83 (sub 15), branch: master, commit date: 2020-05-11 19:18, hash: rB8956e9e5f6c0
Worked: (newest version of Blender that worked as expected)

Short description of error
If particles come into contact with obstacles, then the number of particles increases.

Exact steps for others to reproduce the error
Bake this scene.

Event Timeline

Germano Cavalcante (mano-wii) changed the task status from Needs Triage to Confirmed.Wed, May 13, 2:48 PM
Germano Cavalcante (mano-wii) changed the subtype of this task from "Report" to "Bug".

I can confirm.
It is as if the volume of the liquid gradually increases although it does not have an outflow.
Problem seen in 2.90 rBf9d0f59bed4d and 2.83 rB50ef801a79b5

I've seen a similar report somewhere else before, but can't find it right now. I can also reproduce the issue.

@Sebastián Barschkis (sebbas) do you know if this is a bug in our code or more likely an issue with the solver?