Inventor very slow boot (plus 5 minutes)

Hi

I have a Flashforge Inventor which is about 1,5 years old and being used regularly.
Staring about 3 months ago, the Inventor takes 5 minutes plus to startup / boot

As soon as you power on, the screen goes on and shows the logo, but it can takes over 5 minutes for the printer to play it's "welcome" tune and be ready.

I connect normally via Wifi, but very often just print from the internal card.
Could it be that there are too many designs on the internal card and that is slowing the boot?

I have seen people having similar issues with a Dreamer and after they manually reposition the printer head, the system boots.
Are there more people having similar issues?

Thanks for any help.
Harpert