When a sortkey contains a pipe, the API can return a continuation like:

<query-continue>
<categorymembers cmcontinue="Bar|Baz|" />
</query-continue>

When using that, the API obviously returns the error message:

<error code="cmbadcontinue" info="Invalid continue param. You should pass the original value returned by the previous query">

The same issue may apply to other modules that use non-title-validated strings in continue parameters (if there are any other ones).

Version: 1.14.x
Severity: enhancement