Alarms or Events are not being received as soon as they occur and there is a large delay before they are written to the Database.
Review the controller error log. If there are 6c0e errors, this indicates the comms buffer is filling up (see Controller error log: error transmitting (LAN_ERR_TRANSMIT_ERROR)).
Another indicator is in the ACCTRace logs. Check if Alarms are being logged in the Database when the WS thread is receiving them. The time in the ACCtrace may be logged as the TimeOfLog.
Investigate the programming to see if it is polling data from a BACnet controller constantly. There may be no delay in poll requests which can overload the controllers comms buffers. This will in turn delay some Alarms from being delivered to the Workstation to be displayed and logged in the Database.
Fix programming so there are wait lines between each poll.