Checkbox for using privileged extension unchecks when you leave settings tab

Device OS and version: Lineage OS 15.1 Android 8.1
Device model/manufacturer: Xiaomi Mi5s
F-Droid version (in the About screen): 1.3-alpha2
F-Droid privileged extension version (if installed): 0.2.8

When I check in settings that I want use privileged extension and leave settings tab this setting immediately disables and F-Droid do not use this extension to install apps (you have to install manually).

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information