[VNAV issue (in descent)]

I am getting an issue in descent with the LevelUp planes. The speed is constantly over/undershooting the target (as in the FMC/DES page): the indication on the PFD then keeps changing between 'FMC SPD', 'RETARD' (both in green) and 'ARM" (in white) as the a/c tried (unsuccessfully) to stabilise itself.. If I click on SPD INTV things settle down, but that shouldn't be required, AFAIK?

Also, connected with this I guess, using ALT INTV or LVL CHG very soon produces a very high descent rate (up to 4800ft/min) and of course, as a result, the FMC SPD target is greatly exceeded: the excessive descent rate is not being moderated in order to reduce the ever-increasing airspeed. I have to descend using V/S to maintain any realistic control. (Oddly, below FL100 VNAV seems to work much better, moderating descent rate to achieve the required speed as expected).

Thanks! (Great planes, notwithstanding any issues!!  )

[Felis Yak-40 in VR?]

Request for: Yak-40

Made by: Felis

https://github.com/parshukov/Yak-40-Felis-for-X-Plane-11/releases

Does the addon currently have a VR compatible yoke (does it move with touch controllers)? No

Hi. None of the switches or levers responds in VR (so other questions in the 'template' seemed irrelevant??). This was a very nice plane to fly, but as I now only ever fly in VR, it sadly just sits in the 'hangar': what a shame! Way beyond my competence to do this, so if anyone can create VR object and config files to bring the plane to life, it would be so much appreciated (and hardly just by me, I am sure!). Thank you.