Boot time with NFS connection to NAS

I have connected my Synology NAS for movies, series and music via NFS to the newest BPI M5 CoreElec image. When booting CoreElec with NAS turned on, the connection is established and all icons are immediately available.
But when the NAS is off, it takes up to 3 minutes for the icons to appear, I think it tries to connect the NFS before. I also tried to connect with SMB, but with the same result.
Is there any option that allows faster operation even if the NAS is off?

Best regards

Schaagi

Leave your NAS on