\argmax_t not recognized to subscript like operator

[castedo]

REPRO:

Type

\argmax_t Z_t

into the LaTeX field on https://mathlive.io/mathfield/demo/.

GOT: the t appears by the lower right corner of max:

EXPECTED: the t appears under arg max, like:

COMMENTARY:

The function \argmax is listed on https://mathlive.io/mathfield/reference/commands/ as a supported LaTeX command. In KaTeX (and LaTeX, but not MathJax), this function is converted/recognized as expected (type repro input into https://katex.org/#demo to see).

WORK-AROUND:

Note to visitors: there are many work-arounds including

\arg\max_t Z_t

which puts the t under the max and

\operatorname*{arg~max}_t Z_t

which works as expected.