Error while requesting math expression description

[CyrilleB79]

Issue

Error while requesting a description of a math item

IO - inputCore.InputManager.executeGesture (17:21:03.172) - winInputHook (8204):
Input: kb(desktop):control+shift+rightArrow
ERROR - mathPres.MathCAT.MathCAT.MathCATInteraction._do_navigate (17:21:03.185) - MainThread (26088):
Traceback (most recent call last):
  File "mathPres\MathCAT\MathCAT.pyc", line 159, in _do_navigate
OSError: Internal error: With en/ClearSpeak in Enhanced mode, can't DescribeNext from expression with id 'Mdszbjan-22' inside:
 <math data-from-mathml='math' id='Mdszbjan-0' data-id-added='true' data-intent-property=''>
  <mrow data-from-mathml='mrow' id='Mdszbjan-1' data-id-added='true'>
    <mi data-from-mathml='mi' id='Mdszbjan-2' data-id-added='true'>x</mi>
    <mo data-from-mathml='mo' id='Mdszbjan-3' data-id-added='true'>=</mo>
    <fraction data-from-mathml='mfrac' id='Mdszbjan-4' data-id-added='true'>
      <mrow data-from-mathml='mrow' id='Mdszbjan-5' data-id-added='true'>
        <minus data-from-mathml='mrow' id='Mdszbjan-6' data-id-added='true' data-intent-property=':prefix:'>
          <mi data-from-mathml='mi' id='Mdszbjan-8' data-id-added='true'>b</mi>
        </minus>
        <mo data-from-mathml='mo' id='Mdszbjan-9' data-id-added='true'>±</mo>
        <square-root data-from-mathml='msqrt' id='Mdszbjan-10' data-id-added='true' data-intent-property=':function:'>
          <mrow data-from-mathml='mrow' id='Mdszbjan-11' data-id-added='true'>
            <power data-from-mathml='msup' id='Mdszbjan-12' data-id-added='true'>
              <mi data-from-mathml='mi' id='Mdszbjan-13' data-id-added='true'>b</mi>
              <mn data-from-mathml='mn' id='Mdszbjan-14' data-id-added='true'>2</mn>
            </power>
            <mo data-from-mathml='mo' id='Mdszbjan-15' data-id-added='true'>-</mo>
            <mrow data-from-mathml='mrow' id='Mdszbjan-16' data-id-added='true'>
              <mn data-from-mathml='mn' id='Mdszbjan-17' data-id-added='true'>4</mn>
              <mo data-from-mathml='mo' id='Mdszbjan-18' data-id-added='true'>&#x2062;</mo>
              <mi data-from-mathml='mi' id='Mdszbjan-19' data-id-added='true'>a</mi>
              <mo data-from-mathml='mo' id='Mdszbjan-20' data-id-added='true'>&#x2062;</mo>
              <mi data-from-mathml='mi' id='Mdszbjan-21' data-id-added='true'>c</mi>
            </mrow>
          </mrow>
        </square-root>
      </mrow>
      <mrow data-from-mathml='mrow' id='Mdszbjan-22' data-id-added='true'>
        <mn data-from-mathml='mn' id='Mdszbjan-23' data-id-added='true'>2</mn>
        <mo data-from-mathml='mo' id='Mdszbjan-24' data-id-added='true'>&#x2062;</mo>
        <mi data-from-mathml='mi' id='Mdszbjan-25' data-id-added='true'>a</mi>
      </mrow>
    </fraction>
  </mrow>
 </math>

My config

• NVDA 2026.1beta9
• Windows 11 23H2 (AMD64) build 22631.6783