Attach does not work as expected

[eniraa]

When rendering the example from Typst documentation, Wypst seems to treat t as tr and b as br. Moreover, nothing else is rendered.

Typst:

attach(
  Pi, t: alpha, b: beta,
  tl: 1, tr: 2+3, bl: 4+5, br: 6,
)

LaTeX:

\underset{\beta}{\overset{\alpha}{\prescript{1}{4+5}{\Pi}^{2+3}_{6}}}

Outputs: