What ever we said to how and why, this shld not happens before max level speed. 500kph is bellow that speed for the 110.
Max recommended dive speed for most of the 109 was 750. In CoD diving faster than 600kph tend to render aiming impossible.
As a spit might fly for extended period of time at 480 at med alt , it simply negated the Boom&Zoom capability of the 109. I had even difficuties diving on Blenheim bombers flying in formation
IMHO this effect (twisting/shaking) is a wonderful add regarding old IL2 Mach 2 divers but it occurs without any transition at much too low speed.
I think devs shld tune the curve for the effect magnitude. Something hve turned wild in the process