Project window : R/W buttons misbehaviour...

‘Read’ and ‘Write’ automation buttons don’t seem to behave as they were in 6.5 (see attched images). This only occurs with the Group/FX tracks and the ‘Track controls settings…’ dialog is of no use for fixing it : the read/write buttons are not accessible and don’t behave as the other ones.

Thanks for any fix…
C654_ProjectWindow.jpg
C701_projectWindow_RWButtonsIssue.jpg