Coil decoration only works with a specific order

[lcnbr]

#import "@preview/cetz:0.3.0"
#{
let a = (1,0)
let b = (0.12,0.3)
cetz.canvas(length:30%,{
  cetz.decorations.coil(cetz.draw.hobby(a,b),amplitude:0.051,segment-length:0.05112,align:"MID")
})
cetz.canvas(length:30%,{
  cetz.decorations.coil(cetz.draw.hobby(b,a),amplitude:0.051,segment-length:0.05112,align:"MID")
})
}

This code should produce identical images but the bottom one seems to be problematic. Additionally some combinations make the compiler crash. I have a document where this is the case but cannot make a MWE.

[johannes-wolf]

Setting b=(0.12, 0.4) panics because of rounding issues.

[johannes-wolf]

(Has nothing to do with this bug: Please use cetz 0.3.1, as 0.3.0 has some nasty bugs).