Thank you, the nodes are indeed semi random. There are a total of 4 maps with different layouts. Except for the nodes in the first column and the boss, all the nodes can be either a regular battle, an elite battle, a rest point or an item point, with every type having a weight of how big the chance is that that one is chosen.
Someone else has also reported having trouble with the end turn button, though I haven't been able to replicate it. There's definitely still some bugs in there that need fixing.