Unity PERSISTENT error: Assertion failed on expression: 'VCCache::instance != NULL' unity

I have a custom menu item in a Unity2019.1.5f1 project which shows/hides several objects (from hierarchy) and components (from inspectors). To hide objects/components I set their hideFlags property.

After I restart Unity, with or without that script existing in my assets, I got the following error when exiting play mode: ---> Assertion failed on expression: 'VCCache::instance != NULL' unity

The menu item function works as expected but every time if I exit playmode with objects/components hidden I got an error: ---> Assertion failed on expression: 'ptr->GetHideFlags() == m_RequiredHideFlags'

Is there someone who knows how to solve this? Should I report the issue?