instrument track header icon not shown for me

[Sa Leh]

for me

notice to arrows

 

 

regular

 

[Canopus]

To restore the big icon, from the menu select Views > Icons > Show Icons

To restore the small icon: Views > Icons > Track View > Show in Header

Also, if you’re using your own track icons and would like the big and the small icon to be in sync (as I do): Views > Icons > Track View > Show Custom in Header