As my older posts about Advanced Settings this is all based on my own research - an official SK would make these posts superfluous 😎:
SMB GWs Advanced Settings
R80.20.10 Advanced Settings
R80.20.15 Locally Managed Advanced Settings
R80.20.25 Locally Managed New Advanced Settings
Concerning R80.20.35 firmware i only installed it yesterday, so i have not had enough time to recommend or not recommend it 😉 I was really very happy with R80.20.30 and only did this change yesterday to try if a bug is resolved (he is not resolved).
CCSP - CCSE / CCTE / CTPS / CCME / CCSM Elite / SMB Specialist