Printer disconnected of Octoprint

Hello,

Since a couple of days I have a new problem.
At start up the printer is correctly connected with my octoprint, I can take control of the printer (X, Y, Z), but when I laucnh a print or if I set temperature, the printer is systematically disconnected of octoprint with th following message:

Status: Offline after error SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)

I’ve done a fresh install of octoprint and restored an old backup, same result.

I have tried in safe mode, same result.

I have changed USB cable, USB hub, same result.
I have no other idea. If someone can help me, it will be kind of you.
By the way, I can print using a microSD.

Thanks in advance.

Octoprint 1.9.3
Octopi 1.18.0
Printer Sovol SV06+, firmware 1.1.5