IntersectionObserver is not always triggered

[kptdobe]

viewblock checkpoint fired when the IntersectionObserver on the block div "intersects". Problem is that in some cases, it is not the case and the checkpoint is missing.

Test page: https://www.bulk.com/nl/products/creatine-monohydrate/bpb-cmon-0000?rum=on on mobile.

The product-details checkpoint is triggered only because we manually patched the product-details block to observe some internal div of the block (search for sampleRUM in block code).

My initial analysis:

1. the block is huge (4000px height)
2. we intersect at 25%, i.e. when scrolling down, it should trigger but it is not the case
3. the block contains a lot of relative positioned divs which seems to confuse the browser logic or requires css adjustments - could not find them yet.

[adobe-bot]

:tada: This issue has been resolved in version 2.19.2 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: