Yes.
[2018-05-07] CHG: removed default values configuration.
It was too inconsistent with the ability to add arbitrary fields to the Tag Panel. In addition, it has been a source of continued confusion: if someone changes a value without knowing the details of the feature, some back and forth was always needed to spot the issue.
You can use an action "Format value" to fill your default values — though a manual trigger is needed in this case.