Disappearance of automation

[MaNuFiK]

Hi team,
In one of my projects, the automation curve (red lines with dots) disappeared ONLY for one track (guitar).
I can see the automation curves of all tracks except that one.
I thought it was about the version so I updated Live Suite from 10.0.3 to 10.0.5 unsuccessfully.
I tried to isolate the automation track (with the + button) of the guitar without success, the isolated automation track is empty.
I tried to copy the automation of another guitar track to that isolated automation track without success.
I can hear that the automation (pitch of the simpler) is still there but I cannot see it. It is a lot frustrating.
I wrote to Ableton on their Instagram account with a video recording the issue, without answer.
Did anyone have the same issue?
Please help!

[chapelier fou]

Section 19.4 in the manual.