For a while now, when switching mounts, the new mount will show the black bars on the endurance bar for the previous mount that you were riding.
For instance; I was on skyscale. Skyscale has two "charges" in it's endurance bar so it can dash twice. I switch to beetle. Beetle has no black bars in between the endurance bar so it has one "charge" to use it's boost from. With this bug it has been showing the skyscale's black bars on the beetle.
It'll do this with anything. Raptor to jackal will show two charges, jackal to bunny will show three, etc.
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