Assertion failed: data must be asc ordered by time. TIME DIPLICATES

[Yaroslav-Bulavin]

Lightweight Charts™ Version: ^4.2.0

Steps/code to reproduce:

From the error I understand that I have the same time property for a few entries:
Assertion failed: data must be asc ordered by time, index=3, time=1727077163.929, prev time=1727077163.929;

I using data from the backend to get coin price history, approximately 400 items in the array.
Array item:

currency_code: "BTC"
high24hr: "64146.2"
id: 1161674
low24hr: "62603.6"
price: "62890.13"
timestamp: "2024-09-20T13:57:28.947Z"
vol24hr: "238901766.70551"

I have an endpoint that saves data in storage:

getCoinPriceHistory: builder.query<GetCoinPriceHistory, { coin: CoinEnum }>(
      {
        query: ({ coin }) => ({
          url: `/prices/${coin}`,
        }),
        async onQueryStarted(id, { dispatch, queryFulfilled }) {
          try {
            const { data } = await queryFulfilled;
            console.log('DUPLICATES', findDuplicateDatesWithTime(data?.prices));
            dispatch(SET_COIN_PRICES(data?.prices || []));
          } catch (err) {}
        },
        providesTags: [ApiTagsEnum.GET_COIN_PRICE_HISTORY],
      },
    ),

I added console.log to find duplications in the response data.
The findDuplicateDatesWithTime function:

function findDuplicateDatesWithTime(data: CurrencyType[]) {
  const duplicates = data.filter((x, i, arr) => {
    return arr.some(
      (y) =>
        new Date(y.timestamp).getTime() / 1000 === new Date(x.timestamp).getTime() / 1000 &&
        y.id !== x.id,
    );
  });
  return duplicates;
}

But it logs me empty array every time(No duplicates have been found). So BE response is valid.

This is how I use timestamp from the response:

const formattedInitPrices = coinPrices.map((info) => ({
      time: (new Date(info.timestamp).getTime() / 1000) as Time,
      value: Number(info?.price),
    }));

The strangest thing is that sometimes it works without any errors after the page refresh, but sometimes it crashes.

Tech stack: react, vite, lightweight-charts, typescript, redux-toolkit

Actual behavior:

Error Assertion failed: data must be asc ordered by time, index=3, time=1727077163.929, prev time=1727077163.929;

Expected behavior:

It should work whenever BE response has unique entries in the array

Screenshots:

CodeSandbox/JSFiddle/etc link:

[SlicedSilver]

I suspect that your findDuplicateDatesWithTime isn't correctly identifying duplicate timestamps. Any two items which have the same time value would be considered a duplicate even if everything else was different.
In your case, you code is checking if the timestamp values match but also check that the id values match. So perhaps try removing && y.id !== x.id and you'll find the duplicate values.