I first thought the look for single effects works not sometimes but it's the group look.
The 'Stomps' 'Stack' and 'Effects' buttons lock ALL effects in the corresponding section but NOT this group button itself.
e.g. one rig has the group button 'Effects' OFF and another rig has the 'Effects' button ON - then this will NOT be locked in case I look this 'Effects' button.
This can be reproduced for all of my rigs - I use firmware 6911.