Not more than one subscript per row

[PaulDebus]

Hey,

I am using the latest version of aurelius and have trouble when writing formulas. In general, KaTeX works good, but when I put more then one subscript per row, the TeX code does not get parsed at all. The context seems not to matter, the simple x_1 x_2 breaks the same as a complex formula, whereas both work fine if there is only one subscript.
Also there is no difference if I use inline or displayed math.

I tried updating to the latest version of KaTeX but it did not change anything. In the demo on their homepage the examples work well, so I guess this is an issue in aurelius.

Can you reproduce this issue.

Thanks in advance!!!