Yeah. I started watching like a decade ago, and got to see all of like two new seasons release, and the last one ended on a fucking cliffhanger. It got canceled a couple of years later after having been greenlit for another season, so the next season would have been probably half done already, though I imagine their production pipeline was likely a long, involved writing and storyboarding process followed by animation and voice-work at the tail end for cost reasons, so it may be that while they were greenlit to write another season when it came time for the big investment of animating and voicing it the plug got pulled.

It maintained a pretty active, devoted fan-base despite the long gaps between seasons, though.