SU2 airfoil simulations don't converge for large number of surface points

[atharvaaalok]

I am running SU2 simulations with different number of coordinate points on the airfoil shape.
Each surface point I specify the boundary condition.

Simulations runs successfully for low number of surface coordinates (<600)
But as I increase the number of points (say 800) I see sudden divergence and SU2 failure.

What could be the main culprit here and how can I solve this problem?

EDIT:
Data files and scripts:
airfoil.dat
su2.cfg
particular_settings_of_cfg
gmsh_meshing_code

[bigfooted]

Do you have a testcase that you can share and discuss? It is unclear to me what the setup is, what kind of boundary conditions (user defined bc's?),..

[atharvaaalok]

Hey @bigfooted I've updated the original post to include the useful files.
Let me know if I should provide more details.

[ozdemirh]

Do you keep the CFL number the same while increasing the number of elements (decreasing the element size)? If so, could you try either lowering the CFL number or using the CFL_ADAPT option?