Updates/add-on either not completing or taking immense amount of time

Hi,
I have noticed that lately updates take extremely long (like upgrade to 0.88.0 and 0.88.1 took 5 hours!)
I now try to install the Unify add on, but it starts installing and then just hangs the Raspberry pi (yellow light stays on and RPI is unresponsve). I left if overnight hoping it would complete, but it didn´t…

After restarting (unlugging and plugging back in) Hassio starts up as normal and nothing can be seeen in the homeassistant.log…

Anyone has any clue what this might be, how I can solve it and how I can find out whether the RPI is actually doing someting or just hung?

see also the load…shows that it hasn´t been doing anything:
image
Thanks!

don´t ask me why or how, but after several tries all of a sudden the Unify add-on was there… strange strange…