I think it's you?

Fine for me on voyager and I think you meant Lance Armstrong, but now I’m picturing Neil frantically pedaling on a stationary bike somewhere in a NASA facility while the scientists keep telling him he has to go faster

It isn't on desktop. Sounds like typical app weirdness.

Are you using app? Boost doesn't play gif well, sometime it's just slowmo and most of time it just freeze, you have to click it and then it will play.