The F.PORT still does not work in this release. Same behaviour as reported before. Sorry, but from my point of view this is CRITICAL as it fakes you in having the control of the aircraft but after 3 or 4 minutes the connection is lost and AP turns failsafe. I have a MatekH743 together with FrSky Archer RS receiver.
Below is the image I take after 25 minutes runnign with Fport (full control with no issues, besides the warnings being indoors)
Updated through MP to 4.1.2 (no bootloader update) and no issues after 15 minutes running.
After updating the Bootloader thorugh MP, Fport failed the connection after 5 minutes
If the bootloader suffer an update between the 4.0.9 and the 4.1 maybe this bug is related to the bootloader.