Hi,
I have just updated today 2 August 2019. I cannot say if it this latest update that has caused the following problem or not.
It is not possible to upload large files to the server using the Filemanager. I have tried logged in as Admin with root access. It is not possible to upload files (around 80MB), using the drag and drop interface of directory selection. Does not work using the Basic File manager either. (Wanting to upload cPanel migration files).
It is also not possible to upload files when logged in as an CWP user.
I have tried with small files (approx 30kB) and this works. The problem seems to be with larger files.