stickyHeader + InnerContainer error

[GollyJer]

I'm having trouble getting stickyHeaders to work with LegendList. They don't seem to want to stick, they disappear. 😛
I'm also getting an error on render which may be related.

Here's the error.

Warning: Cannot update a component (`InnerContainer`) while rendering a different component (`ForwardRef(LegendListInner2)`). To locate the bad setState() call inside `   
    in LegendListInner2
    in StateProvider
    in LegendList2

And here's the gist of the code.

const stickyHeaderIndices = useMemo<number[]>(
  () =>
    datesAndSchedules
      .map((item, index) => (!Array.isArray(item) ? index + 1 : -1))
      .filter((index) => index !== -1),
  [datesAndSchedules],
);

Which simply results in an array like [0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24]

<LegendList
  ref={scheduleListRef}
  data={datesAndSchedules}
  getItemType={(sectionHeaderOrSchedules) =>
    Array.isArray(sectionHeaderOrSchedules) ? 'row' : 'sectionHeader'
  }
  initialContainers={30}
  showsHorizontalScrollIndicator={false}
  showsVerticalScrollIndicator={false}
  stickyHeaderIndices={stickyHeaderIndices}
  onViewableItemsChanged={({ viewableItems }) => {
    const topDate = viewableItems?.[0]?.item;
    if (!Array.isArray(topDate)) {
      scrollDateSliderToItem(topDate);
    }
  }}
  renderItem={({ item: dateOrSchedules }) => {
    // section header - date
    if (!Array.isArray(dateOrSchedules)) {
      return (
        <c.ScheduleListSectionHeader
          date={dateOrSchedules}
          onPress={() => {
            scrollListToItem(dateOrSchedules);
            scrollDateSliderToItem(dateOrSchedules);
          }}
        />
      );
    }

    // row - schedules
    return <c.ScheduleListRow schedules={dateOrSchedules} />;
  }}
/>

To ensure it wasn't ScheduleListRow I set it to just render some text.
Everything works with a FlatList.

Here is LegendList. As I scroll down the rows disappear. On up they reappear.

XRecorder_Edited_21122024_131814.mp4

[jmeistrich]

Ah I think that's not supported yet! I'll put it on my todo list to fix. It's different than FlatList because in Legend List items are absolutely positioned so sticky doesn't work. Or if anyone has any ideas, a suggestion or PR would be awesome!