Since upgrade to Angular 11.1, ngbCollapse elements get no animation when built for production (ng build –prod).
Other directives like ngbTooltip work as usual.
Animation works regular in dev build even for ngbCollapse.
Link to minimally-working StackBlitz that reproduces the issue:
Don’t know how to issue a production build on StackBlitz
Versions of Angular, ng-bootstrap and Bootstrap: