IDE unable to process very large files, idea.max.intellisense.filesize is ignored.

Hello, i see a ‘OFF’ label in the top left corner that says: “No analysis has been performed. Highlighting disabled”. I tried  setting ‘Highlight: Syntax’ but then i says “code analysis has been paused because document size exceeds the threshold, right-click to see options.” and when i right click nothing happens, when i tried setting ‘Highlight: All problems’ static analysis enables but syntax highlighting is still missing. The file in my case is: https://github.com/KhronosGroup/Vulkan-Headers/blob/main/include/vulkan/vulkan_structs.hpp  (6.76mb in size, 170k lines of code)
Setting  ```idea.max.intellisense.filesize``` to even 100000 didn't do anything, is there some sort of hard lock?