I use SE (paid) for long time and was always happy with its features. However there is one problem I can't live with: download speed. I use SE on two devices (smartphone and tablet). Both are relatively fast, LTE enabled. When I use SE to access my server the download speed varies between 40 and 60 kbps on both devices. At the same time and place the same device can download at 20 Mbps using other apps. I've tested both sftp and smb protocols, LTE and WiFi, internal storage and sd card, with same results. I can also observe in network speed monitor that during SE download the device receives a chunk of data with 500-600 kbps and then waits few seconds at 0 kbps for SE to digest the chunk. During those few seconds SE displays download speed about 50 kbps. This is so SLOW.

I use other apps to do faster sftp transfers but would love to stick to SE.

Is there any explanation to this strange SE behavior? Can I do anything to speed it up?