DMP-A6 is connecting to a Synology NAS 220j (2 x 4 TB drives in RAID 0/SRH), to read a 25k+ Song library on 1 Gbps wired Ubiquity Unify Network ... Album Covers are somewhat slow to load... music playback at even 512DSD (very large files) seem fine.. Anyone else having this problem? Does the DMP-A6 cache the cover art of is it fetching it from the NAS every time? Wondering if I should byte the bullet at install an 4TB NMVE.