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InfiniteScroll with cache prevents scrolling

When using InfiniteScroll with cache enabled, the grid is prevented from scrolling once the cache maxBlocks has been reached.
This is due to the isScroll value in infinite-scroll.ts being false. Which triggers an auto-scroll to the top.

In infiniteScrollHandler(e: Event) the isScroll variable is set to true based on a 600ms timeout. If the data loads slower than that, it  be set to false by removeInfiniteCacheRows(e: ...) 

Once you load the 3rd page, you will observe the issue.

Method of reproducing:

I enabled the cache in app.component.ts: this.infiniteOptions = { initialBlocks: 1, enableCache: true, maxBlocks: 2 }; 

and added a 2000ms delay in order.service.ts: .pipe(delay(2000), (data: any) => data);