TextMesh Pro IndexOutOfRangeException when trying to display text

I change the text property of a TextMeshProUGUI in a script and when that text should get displayed I get a "IndexOutOfRangeException: Index was outside the bounds of the array." error message and the display field is blank. I can see the text within the inspector in the editor and if I change it there it starts getting displayed in the game as well.

Spoiler: Full stacktrace

[Exception] IndexOutOfRangeException: Index was outside the bounds of the array.
TMP_Text.FillCharacterVertexBuffers() C:/ProgramData/Unity/cache/packages/packages.unity.com/com.unity.textmeshpro@1.2.2/Scripts/Runtime/TMP_Text.cs:4957
4956: // Setup Vertices for Characters
-->4957: m_textInfo.meshInfo[materialIndex].vertices[0 + index_X4] = characterInfoArray.vertex_BL.position;
4958: m_textInfo.meshInfo[materialIndex].vertices[1 + index_X4] = characterInfoArray.vertex_TL.position;
4959: m_textInfo.meshInfo[materialIndex].vertices[2 + index_X4] = characterInfoArray.vertex_TR.position;

TextMeshProUGUI.GenerateTextMesh() C:/ProgramData/Unity/cache/packages/packages.unity.com/com.unity.textmeshpro@1.2.2/Scripts/Runtime/TMPro_UGUI_Private.cs:3573
3571: if (elementType == TMP_TextElementType.Character)
3572: {
-->3573: FillCharacterVertexBuffers(i, vert_index_X4);
3574: }
3575: else if (elementType == TMP_TextElementType.Sprite)

TextMeshProUGUI.GenerateTextMesh() C:/ProgramData/Unity/cache/packages/packages.unity.com/com.unity.textmeshpro@1.2.2/Scripts/Runtime/TMPro_UGUI_Private.cs:2685
2683: m_totalCharacterCount = ellipsisIndex + 1;
-->2685: GenerateTextMesh();
2686: m_isTextTruncated = true;
2687: return;

TextMeshProUGUI.GenerateTextMesh() C:/ProgramData/Unity/cache/packages/packages.unity.com/com.unity.textmeshpro@1.2.2/Scripts/Runtime/TMPro_UGUI_Private.cs:2685
2683: m_totalCharacterCount = ellipsisIndex + 1;
-->2685: GenerateTextMesh();
2686: m_isTextTruncated = true;
2687: return;

TextMeshProUGUI.OnPreRenderCanvas() C:/ProgramData/Unity/cache/packages/packages.unity.com/com.unity.textmeshpro@1.2.2/Scripts/Runtime/TMPro_UGUI_Private.cs:1641
1639: m_ignoreActiveState = false;
-->1641: GenerateTextMesh();
1642: }
1643: }

TextMeshProUGUI.Rebuild() C:/ProgramData/Unity/cache/packages/packages.unity.com/com.unity.textmeshpro@1.2.2/Scripts/Runtime/TextMeshProUGUI.cs:209
207: else if (update == CanvasUpdate.PreRender)
208: {
-->209: OnPreRenderCanvas();
211: m_verticesAlreadyDirty = false;

CanvasUpdateRegistry.PerformUpdate() C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/CanvasUpdateRegistry.cs:150

Canvas.SendWillRenderCanvases()

 

Since many things could be contributing to this behavior like the raw text, container size, layout components, the fact that the text is truncated and using Ellipsis, etc.I will need more information and most likely a Repro project.

If you are able to reproduce reliably, could you please submit a bug report and provide me with the Case# or simply post a Repro Project here?