Flexbox + auto-resize making canvas grow infinitely

[radagasus]

When trying to make a network container fill the remainder of a wrapper container using flexbox properties, whilst also using autoResize: true, the canvas on which the network is drawn keeps growing in height.
A minimal example can be found at https://codepen.io/radagasus/pen/zYXgjdN.
Anything I can do to fix this problem?

[radagasus]

The temporary fix provided in this other issue can be tailored to my situation to fix the problem. This means no flex-box properties and dynamic resize of the network container based on resizing events (ResizeObserver).