Problem with optimistic updates in SWR 2

[dimau]

Hi guys, I tried to get optimistic updates

import { sendRequestInfoAboutYourself } from "../../shared/api/sendRequestInfoAboutYourself";

export function GlobalLevelSelect() {
  const { data, mutate } = useSWR(key, fetcher);

  async function handleClick(clickedLevel: string) {

    const newData: = {
      /*** Prepare a new object with desired values based on data object ***/
    };

    await mutate(sendRequestInfoAboutYourself(newData), {
      optimisticData: newData,
      rollbackOnError: true,
      revalidate: true,
      populateCache: false,
    });
  }

  return (
    /*** Template of the component ***/
  );
}

I don't understand why it doesn't apply optimistic data for my cache key and I see updates only after 1-2 seconds when revalidation done after updating on the server

[dimau]

The problem was in mutation of the current object in SWR cache