Custom branch URL resets after every plan configuration change

Hey.

We love the automatic branches detection in Bamboo. However, for some of our projects we don't use the default SVN ".../branches/" path but ".../releases/" instead. The problem is that this custom URL automagically resets itself back to default "/branches/" every time someone makes a change in plan configuration.

Steps to reproduce:

• Create a new plan.
• Create new Subversion source repository
• Go to "Branches" tab
• Click "Change Subversion branches URL" and change the URL from ".../branches/" to ".../releases/" (or something else). Save.
• Go to "Dependencies" tab. Add any child plan. Save
• Go back to "Branches" tab. See that the URL changed back to ".../branches/" again.

This does not seem to happen if you uncheck "Automatically detect root URL for branches" box in "Advanced Options" of SVN source repository settings and provide custom branches URL there.