I did some modifications to Hyperion.NG for arm. My first test didn’t bring up the slow down yet. Maybe someone would test it!?
Addon is for arm, 8.95.7.
Just deinstall your current Hyperion.NG from the Kodi addon menu, don’t remove user settings.
Then install the zip file by the Kodi addon menu.
[Service.hyperion.ng-9.0.100.zip]