[CommonHTML] Anomaly caused by accented character inside \text{}

I have come across an anomaly in MathJax for which I tried to furnish the proverbial minimal example but failed. I can nevertheless furnish a page without apparent problems, indicate the very slight change that will trigger the problem and screenshots of both.

The page is https://cdi2tp.math.tecnico.ulisboa.pt/praticas/3

To see the problematic area expand the last "Solução" by clicking the black triangle to its left. You will see something like this.

If one adds an acute accent to character a in the word contrario in the begin{cases}\end{cases} structure, then one gets what follows.

My attempts at replicating this in simpler circumstances have failed miserably so far.