Ishanna

"Home One was close behind it, as I recall. Did we beat Meeta Cors' Nautilian out of stardock?"
"A prescient comment. The ship's brittle construction ultimately hampared its rollout, particularly after the Ishanna inversion."

―Admiral Gial Ackbar, and Ushos O. Statura in an annotation on The Rebel Files

Ishanna was a location where the Ishanna inversion occurred, which hampered the performance of the rebel starship Nautilian.

Sources

• Star Wars: The Rebel Files (First mentioned)