Thank you for the log. I'm mow suspicious that this 'may' have something to do with your flight being below the control centre altitude, which of course should not cause any issue, but we'll see.
I would like you to either try this same flight, but with a cruise altitude of 9,000', which will ensure you are handed over to a control centre (you have that altitude currently set at 8,000') or alternatively change the control center altitudes to 5,000'. To do that you need to go to Options #3, Control Centre Mapping and Altitude Settings
Please let us know how you get on and include your log file again