[SOLVED] getEstimatedRangeSizeBytes always returns 0

What could cause calls to getEstimatedRangeSizeBytes to systematically return value 0 even though there are data in the DB?

The storage engine is redwood-1-experimental.

In case that matters, tenant_mode is set to required_experimental.

[edit] Problem solved, was an issue with the tenant used during testing. Everything is working as expected.