I experienced the same. In 0.25 I would gravity turn slowly to 30km, where I would lock it at a 5 degree inclination until my apoapsis hit 85km. Normally I would then be able to coast up to about 80-82, but now it falls way back into the atmosphere. Funnily enough it didn't cost me that much more DeltaV than earlier, it just required a bit of a steeper incline (10-15 degrees) and a bit more maintenance during ascent.