Those that follow the Github repositories closely are probably aware that we have to do a hotfix release due two separate issues. Thanks to @avehtari, @Stevo15025 and @bbbales2 for spotting and reporting them.
I am coordinating with @serban-nicusor to make this as painless as possible. We have three issues opened for the three repos if anyone has any questions/comments:
The plan is to do the Math 3.1.1 release tonight and then proceed with the rest tomorrow (me and Nic are in the CET timezone).