Interestingly, the 29M LINES residuals had no strange behavior.
Sorry but I just had to do this , here are the comparisons of ‘residuals and numerics’ between…

SOLID (wing only 7192321v mesh):

LINES (hanging lines, no wing 29M mesh):
And I have to add an image of the SimScale DEFAULT numerics:
Now I have to get out my magnifying glass to see and analyze the numerics differences give me a moment
To start with, lets looks at Laplacians:
 SimScale numerics defaults Laplacians = Cell Limited Linear
 SOLID numerics Laplacians = Gauss Linear Corrected
 LINES numerics Laplacians = Gauss Linear Corrected
Now, Solvers:

SimScale numerics defaults Solvers=
U is Smooth solver U Smoother is GaussSeidel
P is GAMG P Smoother is GaussSeidel
k is Smooth solver k Smoother is GausSeidel
w is Smooth solver k Smoother is GausSeidel

SOLID numerics Solvers =
U is Smooth solver U Smoother is GaussSeidel
P is GAMG P Smoother is GaussSeidel
k is Smooth solver k Smoother is GausSeidel
w is Smooth solver k Smoother is GausSeidel

LINES numerics Solvers=
U is PBiGC
P is GAMG P Smoother is GaussSeidel
k is PBiGC
w is PBiGC
Now, Schemes Time Differentiation:
 SimScale numerics defaults Schemes Time Differentiation = ALL CellLimited Gauss Linear
 SOLID numerics Schemes Time Differentiation = ALL Gauss Linear
 LINES numerics Schemes Time Differentiation = ALL Gauss Linear
Now, Schemes Divergence:
 SimScale numerics defaults Schemes Divergence = u,k,w are Gauss Linear upwind and others Gauss linear
 SOLID numerics Schemes Divergence = u,k,w are Bounded Gauss upwind and others Gauss linear
 LINES numerics Schemes Divergence = u is Gauss Linear upwind  k,w are Gauss upwind and others Gauss linear
WOW, looking at all that I am in wonder as to why I changed all those things but, at the time when you are grasping at straws to converge, you do try a LOT of things with recommendations from everywhere.
I make no justifications for the differences, that is just the way they are and all the sim runs have nice stable results…
This is at least forcing me to TRY to get numerics under control again
I am not even sure that the strange residuals of the SOLID 7192321v mesh sim run really have anything to do with numerics, but I did mention my gut feeling earlier…
Just for the heck of it I will try:
 On the SOLID sim, the LINES solvers
 On the SOLID sim, the LINES Schemes Divergence
 If neither of 1 or 2 fixes the SOLID strange residuals, I will try 1 and 2 together on the SOLID sim
Sigh… but I need sleep now
I am looking for nirvana numerics here, that work for NewMeshAlgo and HexParametricAlgo, not sure that they exist…