DO 9.1.0.6
I have problems with making big icon size stick for buttons, see attached image (this is of course after applying changes to the button). Sometimes it turns to big size after restart, but sometimes it doesn't.
The thing that sometimes helps is adding another button with big size icon.
Have you ever encountered such behaviour?
Did you set the Image size for the toolbar to Default? Default tells the Toolbar to display the label or image etc according to the setting in the individual buttons.
Setting it to default helped, but still it doesn't explain the previous erratic behaviour. Sometimes I could get big icons and sometimes not. Moreover, the same icon could change from big to small.