- initial acceleration: a known but with twin engine aircraft in MSFS. See here: Static thrust bug on multi engines (and Icon A5) found!
Actually, Tommy, the author of this mod, found the bug. - Throttle going “up”: Did you have a look at the “DA62X Familarisationi.pdf” included in the Mod-files?
There you can see that at low power-lever settings, RPM goes up again. This is what you might have misinterpreted as throttling up?
Furthermore, there you can find the following warning, so maybe a physical prop axis is the cause of your problems:
If you have a physical propeller axis, this will interfere with the FADEC operation if it is mov-ing/jittering/fluttering. The constant inputs override the ones from the FADEC and cause the RPM to go all over the place. Make sure that it is not moving/jittering/fluttering.
Move your propeller axis to an end stop, 0% or 100%. This tends to work.