In Plesk Obsidian for Linux, exported database dump is downloaded multiple times if the option Automatically download dump after creation is enabled
- #PPPM-11385 "Exporting a database dump and closing the corresponding notification no longer results in the dump being downloaded for the second time if the “Automatically download dump after creation” option is enabled."
- Plesk Obsidian 21 January 2020
If update is not possible for some reason you may try the following
Upgrade Plesk to the latest version as per the instructions here: How to install Plesk updates