Hello - also experienced this issue twice yesterday with the Fenix while using QuickEdit. Happened to me once at MSK Productions OMSJ (marketplace version/Navdata API enabled), and again at FlyTampa EKCH (non-marketplace/Navdata API disabled). Running vPilot (w/ FSLTL VMR), FSRealistic, Spad.Next, Volanta, Fenix.
Steps to reproduce and symptoms (green dots not disappearing) are 100% consistent with the below video. Something seems to have changed in the last week or two, as it was working 100% reliably for me previously (including post-SU10, suggesting it was a GSX update and not a sim change that broke it).
I will give the F6 workaround a shot but this is the single most important function for me in GSX so really hoping for a fix asap.