Before the last update (LR CC 2015.6) the shortcut Shift+T worked for correction brush within Graduated Filter and Radial Filter.
Now it doesn't, this shortcut works for Transformation now. Is there any new shortcut for the correction brush within a local adjustment filters?
Thanks for the report. This will be fixed in the next Lightroom update.
The KBSC Shift + T should toggle Guided Upright. And if the Spot tool is selected, it allows cycling spot type. and if the Graduated Filter or Radial Gradient Filter is selected, it will allow cycling the edit and brush modes.