Same issue here as well, after the update to 5.2.5.3145 it sluggish in performance and when logging into the QNAP TS-853A webgui the CPU load is sitting at 98% for a while and after a while it calms down to 45-65% CPU load. In the past the CPU load would be around 2-10% when jumping around in the webgui and if one didn’t do anything it would sitt at 1-2% and when having clients active accessing files via SMB it would be around 5-10%. So something is significantly wrong with this release.