Apologies Raptor. I ended up deleting your first post by mistake. Will contact Admins and see if they can bring it back.
Thanks for your comments. The ELRS Radiomaster external module works flawlessly for me on several radio while my internal ELRS (Bumblebee) drops often. Seems not all modules are created equal. Alternatively, I use wireless dongles which are way more stable than BT.
Great to hear some feedback on physics. I presume this is with the full-size plane rather than training mode (reduced physics)? I don't seem to have much of an issue with harriers but worth investigating as physics can improve a lot. It needs to be a bit more sticky at low speed as now it is not easy to control slow 3D. My advice is to slow down physics and see if you can identify the issue (under params). Feel free to drop me an email and we can discuss.