Gateway starting time

Hi there,
I moved from Ignition 8.0.16 to 8.1. Tried 8.1.0 RC1, RC2 and 8.1.1 nightly.
With these versions, gateway takes about 15/20 minutes in starting procedure. Previously, with 8.0.16, this time was less than 2 minutes.

With a clear installation, starting procedure is very quick.

I tried disabling all components (opc, db, projects…) but I did not get rid of this issue. Starting time is always too long.

I see a great amount of logs of this type:

dispatcher 02Oct2020 08:07:53 ProjectManager not yet running, rescheduling for +2 seconds

What should I check?