For animator serialized assets, a recent bug was introduced that was fixed recently, but have an impact on future animator upgrades.
when going from version < 5 to 7 or more,
- Keep animator state On Disable is false by default
- Write Default Values On Disable false by default.
- no change in behaviour
When going from version 5 or 6 to 7,
- Keep animator state On Disable is false by default
- Write Default Values On Disable false by default.
-There may be a change in behaviour though between those two versions.
To keep the behaviour in version 5/6 if upgrading to 7 and more caused an issue, Write Default Values On Disable should be set to true (in the debug inspector menu of animator)
Sorry for any problems this may have caused, but the original regression caused issues that forced some users to rebuild >100GB of assets.