After modelling a character I've unwrapped the model with Smart UV Unwrap and then painted up an image texture. Everything is fine in Rendered View both in Evee and in Cycles but the texture renders crooked as though the unwrap is messed up. I tried loading an older save with the finished model and unwrapping and painting it again with the same end result - the image texture renders crooked and parts of the mesh even loose the Shade Smooth look (see the right wing of the owl).
What am I missing? Have I messed up while modelling?