I think that's the reason - it's the solution I've found while trying to Google my problem.
Anyhow the issue is simple - you can place a Desalinator up on the ceiling (4 tiles high room right by the ladder) and it will stop working at a tiny bit over 1 ton of salt gathered. I have tried setting priority of it to 9 with no luck and then I put an auto sweeper and a salt-only storage container beside it and still nothing happened.
Steps to Reproduce
Build a Desalinator on the ceiling
This issue has been fixed in either a future version or updated in a previous version.