Just as the title says. Wth is wrong this this series...
What channel is it on? Can you be more specific by what 'skipping all over the place' you mean?
Some have reported issues watching while watching "Hunter" on the Roku Channel.
(https://community.roku.com/t5/Playback-Issues-Audio-Video-Power/Hunter-S1-E1-and-others-have-a-bad-f... and https://community.roku.com/t5/Channel-Issues-Questions/Hunter-episodes-are-replaying-scenes-out-of-o...).
---
I am not seeing this issue, so somehow, not everyone affected. Try watching Hunter on the other free Channels/apps like Pluto, Filmrise. FreeVee(formally IMDb), or Plex and see if your issue is resolved.
If using a Roku device, use the Search feature on your Home Screen to see which Channel/app will work best for you regarding Seasons/episodes.