No not terribly abrupt, but it should be noted that my working solution volume is only 160ml for the JOBO. It's also not a complaint, I love LPD.
I had switched to a different roll of film and was trying to nail the exposure and contrast and was starting to get prints that weren't matching what the enlarger meter was telling me but I was liking the warmth of the prints. It became clear about 3 runs later when the prints came out very underdeveloped and overly warm in color.
Now that I've seen how this happens I can catch it with more aggressive replenishment next time.