Good day to you sir.
Cloudways web stack is designed in such a way that our customers get both the performance and stability out of it, PHP output_buffering settings were Implemented to achieve the best of both the worlds.
Some guides suggest setting output_buffering = Off in your php.ini configuration in order to stream a PHP response. However, in some circumstances, this is useful, but typically, if you’re calling flush() in your PHP code, PHP will flush the output buffer immediately after the buffer is filled (the default value is 4096, which means PHP will flush its buffer in 4096-byte chunks).
Feel free to contact me if you have any more querries.