SVN changelists in 2018.2

Would it be possible to find out what has changed in the handling of SVN changelists in the most recent release? Prior to 2018.2, changing a file within the IDE caused it to be added to the active SVN changelist. Most times, that's the "Default" changelist, which is fine. When you run `svn status` on your working folder, changes in this changelist are listed as having no explicit changelist set, which is what I want/expect.

However, since updating to 2018.2, changing a file within the IDE now seems to create a new named changelist called "Default". Running an `svn status` now shows that my changes are in a specific list. I wouldn't expect this behaviour at all. It hasn't been the case before and it causes a number of issues with the CI tools we use. We've verified this across different members of the team, and this is definitely new behaviour in 2018.2.

Thoughts anyone?