Engine crashes on adding variable to parent blueprint

Hello, sorry about the slow reply.

  1. The crash doesn’t happen in other projects.
  2. The crash happens when I add any variable and hit compile. However if I save before compiling the when I open the editor after the crash the new variable is there and working, but if I add or remove another variable then the crash happens again.
  3. The crash does happen in only some of the children blueprints when following the same steps.

Thanks