Currently, the API response for custom fields is a nested array of depth of more than two. Due to this, the filter can't be applied to API queries based on custom fields.

When we use an API query filter as below:

$filter=customFields/any(r: r/customfield_90689/any(t: t/value eq 'TestingAPI'))

The API response has an error:

The Any/ All nesting limit of '1' has been exceeded.

Due to this limitation, customers are unable to get a list of features by filtering based on custom filed value.