Ops 3.8.1 is now available, which has a collection of fixes, most particularly improvements in how the testing framework matches real Juju behaviour. Read the full release notes for more details.
We’ve also released Ops 2.23.4, which contains back ported fixes from the 3.x series (where relevant to 2.x). Hopefully, you’re already aware of these from their inclusion in 3.x releases, but read the full 2.23.4 release notes for all the details.