fat_cloudz

Maybe your goo containers clipped through your service bay and are connected directly to the heatshield instead...?

Common misconception. Your craft compresses the atmosphere immediately in front of it which increases temperature. The ideal gas law (PV = nRT) is the mathematical explanation; P = pressure, V = volume, n = moles, R = gas constant, T = temp. More info: https://en.wikipedia.org/wiki/Ideal_gas_law https://en.wikipedia.org/wiki/Atmospheric_entry (shock layer gas physics section)

I was having the same issue. Until I started throttling down when I could hear the air really buffeting the rocket. Throttling down early enough to the appropriate thrust levels eliminated that drag related end over end tumble. I think I kept the rocket under 500 m/s (surface) below 10km.