The log is from the ACARS. This usually happens about part way into a flight or about 10 minutes before landing. It works fine until there is a blip (almost like it's refreshing something). Both ACARS and FSX-SE are run in administrator mode.
I've attached the log as I'm now flying without ACARS running but it happened someplace in here I would imagine.
4622734 System time = 02/04/2020 10:38:57, Simulator time = 09:38:16 (14:38Z)
5035453 **** No SimConnect events or states being received! Re-connecting now ... ****
5035562 SimConnect_Open succeeded: waiting to check version okay
5035562 Opened separate AI Traffic client okay
5035656 Running in "Microsoft Flight Simulator X", Version: 10.0.62615.0 (SimConnect: 10.0.62615.0)
5035656 Initialising SimConnect data requests now
5035656 FSUIPC Menu entry added
5035687 User Aircraft ID 1 supplied, now being used
5036703 System time = 02/04/2020 10:45:51, Simulator time = 09:45:31 (14:45Z)
5800672 **** No SimConnect events or states being received! Re-connecting now ... ****
5800765 SimConnect_Open succeeded: waiting to check version okay
5800765 Opened separate AI Traffic client okay
5800781 Running in "Microsoft Flight Simulator X", Version: 10.0.62615.0 (SimConnect: 10.0.62615.0)
5800781 Initialising SimConnect data requests now
5800781 FSUIPC Menu entry added
5800812 User Aircraft ID 1 supplied, now being used
5801625 System time = 02/04/2020 10:58:36, Simulator time = 09:58:51 (14:58Z)
5815750 **** No SimConnect events or states being received! Re-connecting now ... ****
5815843 SimConnect_Open succeeded: waiting to check version okay
5815843 Opened separate AI Traffic client okay
5815859 Running in "Microsoft Flight Simulator X", Version: 10.0.62615.0 (SimConnect: 10.0.62615.0)
5815859 Initialising SimConnect data requests now
5815859 FSUIPC Menu entry added
5815890 User Aircraft ID 1 supplied, now being used
5816015 System time = 02/04/2020 10:58:50, Simulator time = 09:58:55 (14:58Z)
6223593 **** No SimConnect events or states being received! Re-connecting now ... ****
6223703 SimConnect_Open succeeded: waiting to check version okay
6223703 Opened separate AI Traffic client okay
6223703 Running in "Microsoft Flight Simulator X", Version: 10.0.62615.0 (SimConnect: 10.0.62615.0)
6223703 Initialising SimConnect data requests now
6223703 FSUIPC Menu entry added
FSUIPC4.log