iSymphony Becomes Lagged

I’ve been battling an iSymphony issue with no resolution for quite some time. After a few hours of usage, it becomes lagged to the point where it is unusable. When dragging a phone call or placing a call on Park, it takes up to 5 seconds for the the change to show up in Xactview. Another example would be transferring the call to 71 from the phone itself - it can take up to 5 seconds for this change to show up on Xactview. The only way I have found to resolve this is to restart the isymphony service on the server. After this, it will slowly become more lagged again at which point I restart the service and start the cycle over again.

Has anyone else seen this issue or have any ideas on how fix it?