Charts/simlink dropping connection

I love navagraph charts but during long flights simlink quits working and doesn’t track aircraft postion.
If I x out of charts and resign in. It works again.
Any idea why simlink randomly disconnects.?

Xplane11
Msfs2020

Hi,

Do you mean that you keep Simlink running untouched, the problem is resolved by closing and restarting the Charts app?

Regards,

Stephen

Yes. That fixes the issue until it happens again