Hi Robert.
I see your Time Format is set to G:i (24 hour without leading zero)
If you set it to H:i (24 hour with leading zero), it should work for you.
With H:i, the AM/PM correctly does not appear, and the 1970-01-01 issue goes away.
Thanks for helping us discover this bug.
I logged this bug with our developers and will mark this ticket as Pending Fix, which means this thread should receive a reply once the applicable fix has been released. I cannot guarantee when it will be fixed as it’s in the development team’s hands now. They need to assign it, code it, test it, and schedule it for release. I apologize for this issue and appreciate your understanding and patience.