Pattern Stroke Issue

Can anyone see what I'm doing wrong here? I'm trying to create a repeat pattern but 3/4 of the stroke of the dragonfly appears to be a different stroke to the rest.
I have tried everything l can think of short of redrawing it (last resort, as it'll take forever)! I am moving/copying the dragonflies from the left to the right the same distance as the artboard/background square, so l don't understand why this is happening. I've created hundreds of patterns and this has me completely confused.
