It appears that client side call from JavaScript code to google.script.run.testFunc(payload) will silently fail when apyload size exceeds 60157 bytes. For the purpose of test, server side App Script function is as following:

export const testFunc = (payload) => {
  console.log(payload.length);
};

I am curious if anybody else is also facing the same issue and if there is legitimate workaround.

There is no such limitation documented in App Script Reference for script.run