Hi, I’m new to 3D printing, I have got the Tronxy P802MA. I have got it printing however have a few issues with the layers. Every so often the there will be a slight gap in the layers. I’ve attached a photo to show. What would be the likely causes of this. I’m also getting lots of bridging in the infill, this doesn’t matter visually however I don’t know if it is related.

Any input would be appreciated !

Thanks