Disappearing chunks on tilemap

When the player is in a certain area around a tilemap chunk, that chunk is no longer being rendered.
Any ideas what could be causing this?

 

Does this happen when you build the game?

 

Hi, yes it happens when the game is built aswell

 

For anyone else who finds this thread, the resolution to my question was to change the Detect Chunk Culling Bounds setting on the tilemap renderer from auto to manual, and then Increase the size of the Chunk Culling Bounds

 

Thanks! it worked!