Why does Laravel save 0kb files?

Question

PHP

Good evening.
We caught a bug that we can't properly debug.
Once in 150-200 downloads, a user comes across who downloads a normal file (5-10mb in size), and on the server we get a file with a size of 0kb.
We checked all possible limits: memory_limit, upload_max_filesize, post_max_size, everything is ok with them.
There are also restrictions on the client that do not allow the user to upload a file more than necessary.
Our tester has already shoveled everything that was possible and the bug could not be repeated.
Maybe someone faced similar? How can it be cured?

Answer 1

put a crutch, catch the file and debug it with your hands