How did you install it? If you did a manual installation make sure you use the ERP archiver to import the files into these ERP files for the best result, to prevent crashes and to see your helmet permanently:
- incardriver_f1.erp; incardriver_f2.erp and incardriver_classics.erp in ...\Steam\steamapps\common\F1 2019\2019_asset_groups\animation_package\scenes\incardriver\2019
- incardriver_f2.erp in ...\Steam\steamapps\common\F1 2019\2019_asset_groups\animation_package\scenes\incardriver\2018
- frontend_helmets.erp in ...\Steam\steamapps\common\F1 2019\2019_asset_groups\animation_package\scenes\frontend
- incardriver_f1.erp; incardriver_f2.erp and incardriver_classics.erp in ...\Steam\steamapps\common\F1 2019\2019_asset_groups\animation_package\scenes\incardriver\2019
- incardriver_f2.erp in ...\Steam\steamapps\common\F1 2019\2019_asset_groups\animation_package\scenes\incardriver\2018
- frontend_helmets.erp in ...\Steam\steamapps\common\F1 2019\2019_asset_groups\animation_package\scenes\frontend