Hello,
I noticed significant performance drop. Network copy speed to NAS reduced by 50% and network hick-ups observed. No performance degradation observed when copying from NAS.
NAS UI becomes unresponsive occasionally, too.
Restoration to previous firmware release restores everything to normal i.e. copy to NAS operates at full speed, no hick-ups and UI performance is good.
I tested QTS Hero on second device with same results.
I have TS-674A with 2 x 1GB NVMe, 2 x 2GB SSD, 4 x 6TB SATA.