Force php to kill idle connection while stopping download from external remote point?

I have nextcloud, and there is connected remote storage, it is fuse folder of rclone mounted as local /drive.
On this /drive I have some big files.

when I start to download some big file I see it in bmon that my vps is downloading it and serving to me.
But when I cancel it, it still is downloading until whole file is loaded somewhere into memory.

I have to do

service php7.0-fpm restart 

to make it stop downloading.
I also tried

service nginx restart 

but it does nothing.

Please help thanks.