LMFO,
For seed to Avionic is not a bug, is only some aicraft from Carenado is not compatible because use the 2020 WT Title Avionic Framework. For use EFB Send to Avionic need use WT Avionic Framework 2.0 version.
All Inibuild aircraft is same case, because is dont use WT Title Avionic Framework (already the case in MSFS 2020 with A310 and A32Nv2 is not compatible with Default Flight Planer)
Callsign, is a small issue …
3th Party Addon update, need Marketplace so
Also Mission is not CORE Sim …
Have already have a BIG Update last month.