### Context
The DataGrid infinite-scroll sentinel re-created its
IntersectionObserver whenever the onLoadMore callback changed identity
(every isLoadingMore/hasMore toggle). A freshly-created observer
re-reports the sentinel's current intersection state, so a sentinel that
stays in view fired onLoadMore after every page, auto-loading the whole
dataset back-to-back and OOM-crashing the tab on long
transaction/customer histories.
### Summary of Changes
Keep a single stable observer that reads the callback via a ref, so it
only fires on genuine scroll changes.
### UI Changes
Reproduced with a DataGrid in `paginationMode="infinite"` fed by a data
source that always reports `hasMore: true`. The counter tracks how many
load-more fetches fire **with no user scrolling**.
**Before** — the observer is re-created every load cycle and re-fires on
creation, auto-loading unboundedly (the counter races past 290 while
rows stays at 3; on real data each fetch accumulates rows until the tab
OOMs):
**After** — a single stable observer only fires on genuine intersection
changes; fetches settle at 2 and stay put:
<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Fixes DataGrid infinite-scroll auto-loading when the sentinel stays in
view, preventing OOM crashes on long histories. Addresses Linear
1783309406.
- Bug Fixes
- Keep a single IntersectionObserver and read the `onLoadMore` callback
via a ref, so it only fires on real intersection changes.
- Add a regression test that simulates endless `hasMore: true` data and
asserts no new observers are created across load-more cycles.
<sup>Written for commit eb216dfe8a.
Summary will update on new commits.</sup>
<a
href="https://cubic.dev/pr/hexclave/hexclave/pull/1734?utm_source=github"
target="_blank" rel="noopener noreferrer"
data-no-image-dialog="true"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"><source
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srcset="https://www.cubic.dev/buttons/review-in-cubic-light.svg"><img
alt="Review in cubic"
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<!-- End of auto-generated description by cubic. -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: aman <[email protected]>
Hexclave
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