I found strange behavior in SOGo Sieve filtering.
case 1)

• I start with no filtering rule, no sogo.sieve file on mail server

• I create new rule:
  -> "Subject"-"contains"-"buy"
  -> "File the message in:"-"shop"
  -> set "Active"
  -> "Save and Close"
  ==> sogo.sieve file on mail sever is created and it includes correct sieve rules:
  require ["fileinto"];
  if anyof (header :contains "subject" "buy") {
  fileinto "shop";
  }

• then I go again into SOGo filtering page
  -> I disable "Active" flag
  -> "Save and Close"

  • I see some activity in the dovecot managesieve log on mail server
    ==> but no change in sogo.sieve file

• then I try to do some change in my rule (or delete it completly),
  I see it on SOGo page, I see activity in the managesieve log
  ==> but no changes in sogo.sieve file

case 2)

• I start with no filtering rule, no sogo.sieve file on mail server
• I create new rule:
  -> "match all messages"-"Forward the message to:"-"my@address.com"
  -> set "Active"
  -> "Save and Close"
  ==> but Preferences window stay open, no activity in managesieve log, no sogo.sieve is created

I tried to reproduce it on http://sogo-demo.inverse.ca/ but sieve filtering doesn't work in any way there.