We are currently observing an issue where elections at the end of each epoch are unable to run. As a result the validator set is not changing. This appears to be caused by the elections smart contract running out of gas. The team is investigating the best way to address this.
In the meantime, rewards will be frozen until the issue is addressed. This is to avoid giving currently elected groups an unfair advantage.
Separately, the team is considering clarifying the rules around collaboration and voting for groups. More on this in the coming days on this.
The Great Celo Stake Off Team