This proposal:

• Changes the default voting threshold from negative to positive turnout bias. That means with low voter participation, we need overwhelming yay votes for a referendum to pass. With the negative turnout bias, we need to potentially motivate a lot of people to vote down a malicious referendum. With positive turnout bias, it’s sufficient to have less voters at a low quorum to reject a referendum. (GitHub issue)
• Requires preimage submission before proposals can be made. This prevents proposals/referenda being voted on without actually knowing what the proposal is encoding. (GitHub issue)

For more details, please see the following:

https://github.com/interlay/interbtc/releases/tag/1.22.0
https://github.com/interlay/interbtc/compare/1.21.10...1.22.0

The latest compatible clients release for this version is v1.20.0:

https://github.com/interlay/interbtc-clients/releases/tag/1.20.0