Welcome to the forum!
Just to be clear, you are starting it without touching the throttle, yes? In other words - letting the ECU do its thing for the cold start. No throttle - just key on and push start button.
EFI really likes a nice strong battery to get everything in motion for cold starts.
Is your battery in top condition? Do you have a multimeter to check its condition?
Nice clean terminals?
Good clean spark plug?,,,,giving you a good blue spark when grounded ?
When was the last valve clearance check accomplished?
How many miles on your scooter.
Stig