Hello. I recently began to solve leetcode problems and stumbled upon your visualizer. When using it, i tried to look at the tree with following structure:

[1,2,null,1,null,1,null,1,null,1,null,2,null,2,null,2,null,2,null,2]

The online version only draws a single root node and then it shoots to left side, never showing even a second node in that tree.
I use MS Edge and Firefox, both have the same issue. Below is the example. Zooming out does not seem to reveal any more nodes.