We have been experiencing an intermittent issue for some time now, and we would appreciate your assistance in investigating it.
From time to time, our requests fail with a 400 Bad Request response and return the following error:
{
"request": {
"url": null,
"traceId": "E7A724E49B5D8B41A97C7"
},
"error": {
"code": "ApplicationResultException",
"message": "E7A724E49B5D8B41A97C7 The Regex engine has timed out while trying to match a pattern to an input string. This can occur for many reasons, including very large inputs or excessive backtracking caused by nested quantifiers, back-references and other factors.",
"date": "2026-07-14T14:57:48.8438786Z"
}
}
Could you please help us determine:
-
What specific operation or field triggered the regex timeout?
-
Whether there are any known limitations regarding input size or content that could cause this behavior.
-
If there are recommended best practices to avoid this issue.
-
Whether additional diagnostics are available using the provided trace ID.