The developers are aware of simconnect issues.
Please use the discussion topic on Littlenavmap, found here:
Little Navmap 2.6.6 stable version released (update 6) - Community / General Discussion - Microsoft Flight Simulator Forums
The purpose of the #Bugs-and-Issues categories is to discuss issues that affect the base simulator. Please do not discuss issues with third-party addons, or modifications in this category.
If you believe your issue may be caused by a third-party addon/mod, empty your community folder, restart the simulator and try to reproduce the error.
All issues caused by, or involving third-party addons/mods should be reported to the third-party developer. All issues related to the core simulator can be formally reported through Zendesk.
Topic closed.