For me, getting rid of the F-16C_50.lua file fixes the stutter, but of course, I can't use the Streamdeck in that jet. I tried the A10C2, both F15s, F18, both seats in the apache, and even the F22 mod. All of them work fine, except for the F16. Turning off the streamdeck software doesn't fix it either.
EDIT: So I managed to fix my issue by blocking out the following lines in my F-16C_50.lua file:
ExportScript.GroundRadar(mainPanelDevice) -- Reports 2 closest friendlies and 2 enemies (Use in Single Player)
ExportScript.AirRadar(mainPanelDevice) -- Reports 2 closest friendlies and 2 enemies (Use in Single Player)
ExportScript.IglaHunter(mainPanelDevice) -- Locates closest Igla (Use in Single Player)
No idea why it only affected my F16, but these lines exist in your apache file too. Maybe it will work?
EDIT 2: Deleted the original lua file.