Beautiful Math: Equations with matrices not displaying properly in Block Editor

We've received a report that an equation does not display properly in the Block Editor. However, the same equation displays properly in the Classic Editor.

The equation that surfaced this issue is as follows:
```
$latex displaystyle M=left[ {begin{array}{*{20}{c}} 1 & 2 & 3 & 4 \ 5 & 6 & 7 &
8 \ 9 & {10} & {11} & {12} \ {13} & {14} & {15} & {16} end{array}}
right]frac{{-bpm sqrt{{{{b}^{2}}-4ac}}}}{{2a}}$
```

This issue seems to apply to any equation that includes matrices. @aheckler reproduced this issue as well, as seen in this screenshot with the Classic Block on top and the Text Block on the bottom:

Reproduce the supplied matrix equation in the Block Editor and Classic Editor, using the screenshot as the expected comparison. Trace how Beautiful Math renders equations containing matrices in each editor, then verify that the matrix equation displays properly in the Block Editor as it does in the Classic Editor.

Written by the indexing model from the issue text.