today I've observed that accessing Emby via the iPhone app was very slow and no image was loaded at all. After logging-in into my Synology, I've figured out, that the Emby process cosumed 4.5 GB of the 6 GB, installed in my DS218+.
After restarting Emby, this issue was gone. Restarting took several minutes, because the UI was loading extremely slowly.
Installed Emby version: 18.104.22.168
Unfortunately the server log is more than 200 MB big, so I cannot attach it.