Bombard causes ships to fly off to the side

I'm playing my first full game, and going full Xenophobe conquest.

I have a huge fleet and am trying to bombard a planet in a war. But when I click the planet for bombard my ships go flying out into interstellar space (outside of the outer dotted ring).

Things to note:
-I have a claim on the system (playing as commonwealth and the system borders Sol, which I want for RP reasons).
-it is not the enemy empire's last planet.

I tried to save/quit, and it's still happening. Has this happened to anyone else? If so how do I fix it?