The thing is I am transferring the files on my previous free domain to my own custom domain now. I have made no changes ever since. And it has stopped working from then. I replaced the files of previous domain to see if that works. But now that too stopped working.
I think it’s more likely that instead of a JS file being detected as an HTML file, that the reduced file size limit also applies to Javascript files by design. Please understand that a lot of our documentation is based on observation, not necessarily information we’ve been given.
Regardless of why the file is being deleted for being too big, it is, and so you will need to reduce the file size.
The random suffix at the end of the file name gives me the idea that it has been post-processed by something, possible to combine and minify the code. Is that correct? While minification is always good, too much combining saves requests, but means that all visitors have to download a big file, which is not great. If so, there may be some knobs to turn to either improve minification or reduce combination to create one or more smaller files.