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Same demo working without problems in Angular v8 - although StackBlitz doesn't have this problem with v9 either (not sure why), but at least helps illustrate how it was working before The v9 repro is based on ng new of Angular CLI 9.0.5. If building yourself, run locally with ng serve...
@dfmartin - see working Plunkr https://plnkr.co/edit/jCICQ1GXFnzFqFTFlXwh?p=preview Note: you do not need to use this.cdr.markForCheck(); in the $media.subscribe handler. uses local snapshot build of the PR flex-layout.umd.js ThomasBurleson added a commit that referenced this issue...
The dropdown components open performance is affected by the # of other dropdown components on the page. I know this is not great UX, but I have a table of ~1000 items which have a dropdown component in one of the cells, similar to the ex...