When I connect 2 nodes, either with data or variables, and that the second nodes is at the left of the first (what I call a backward connection), it is not possible to properly reshape the node when using curved connections.
Here is an example: Before reshaping
Dear @ipazin, when I wrote ‘reshape the node’, I meant ‘reshape the connection between the nodes’.
In other words, it means moving the ‘middle point’ of the curve to change its shape. Sorry for the confusion.
And indeed, it seems linked to the way the bezier curve is calculated as mentioned by @quaeler.
Thanks for your quick reaction!