Mathjax not rendering properly on iPadOS 26

[GrumpyPanda]

I updated my iPad to iPadOS 26.2 yesterday, and ever since then the MathJax formulas are no longer rendering properly.

Here’s a screenshot of one such case:

It renders properly on Anki 25.02.5 for MacOS and AnkiMobile on iOS 18.7.3:

This is not just limited to subscripts, though it seems like it’s always some upper portion of symbols that is missing.

[Danika_Dakika]

1. Give us the exact text from the HTML view of that field (click </> or < > to see that), or from your card template (if that’s where this is) – as text, please – so that folks can try to reproduce this.

2. Are you using AnkiMobile 25.09 on both iOS and iPadOS? [ Preferences > About]

[GrumpyPanda]

I just checked, and I am on AnkiMobile 25.09 on both iOS and iPadOS.

I don’t remember exactly which card the above screenshot is from, so here is another one that’s not rendering properly:

Full content of the HTML field:

<anki-mathjax>\large
\begin{bmatrix}
\underline{A}_1 &amp; &amp; \\
&amp; \ddots &amp; \\
&amp; &amp; \underline{A}_n
\end{bmatrix}</anki-mathjax>

EDIT - Just realized the HTML field format slightly differs on AnkiMobile, so here’s that as well just in case:

\(\large
\begin{bmatrix}
\underline{A}_1 & & \\
& \ddots & \\
& & \underline{A}_n
\end{bmatrix}\)

What it looks like on iPadOS 26.2:

What it looks like on iOS 18.7.3:

It seems like this happens irregardless of card template, but just for completeness, a basic card template for which this renders improperly on iPadOS 26.2, both on front and back:

Front Template:

{{Front}}

Back Template:

{{Front}}

<hr id=answer>
<hr id=answer>

{{Back}}

Styling:

.card {
 font-family: arial;
 font-size: 20px;
 text-align: left;
 color: black;
 background-color: white;
}

[abdo]

It’s possible that an OS update broke this, because AnkiMobile relies on the built-in web engine to render cards.

[GrumpyPanda]

While doing my reviews today I discovered that zooming in on a formula that didn’t render properly can make it show as intended. Still a bit bothersome, but at least I don’t have to guess at my formulas anymore