Cannot apply annotation shading across all groups in a view

1. Import examples/RF00031_folded.stk
2. Create a few sequence groups (I did this by enabling sequence features, calculating a NJ tree based on sequence features, and cutting it).
3. Enable Colour->'Apply to all groups', and open Colour->By Annotations...

In 2.10.2b1 (commit:dda7701):

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: jalview.renderer.ResidueShader cannot be cast to jalview.schemes.AnnotationColourGradient
at jalview.gui.AnnotationColourChooser.colorAlignmentContaining(AnnotationColourChooser.java:472)
at jalview.gui.AnnotationColourChooser.updateView(AnnotationColourChooser.java:415)
at jalview.gui.AnnotationColourChooser.<init>(AnnotationColourChooser.java:156)
at jalview.gui.AlignFrame.annotationColour_actionPerformed(AlignFrame.java:3295)
at jalview.jbgui.GAlignFrame$120.actionPerformed(GAlignFrame.java:1936)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)

In 2.10.2:

Exception in thread "AWT-EventQueue-2" java.lang.ClassCastException: jalview.renderer.ResidueShader cannot be cast to jalview.schemes.AnnotationColourGradient
at jalview.gui.AnnotationColourChooser.colorAlignmentContaining(AnnotationColourChooser.java:472)
at jalview.gui.AnnotationColourChooser.updateView(AnnotationColourChooser.java:415)
at jalview.gui.AnnotationRowFilter.seqAssociated_actionPerformed(AnnotationRowFilter.java:373)