client.entities.update_partially() possible failure with date range properties

[salvalacruz]

The method client.entities.update_partially() fails in this situation:

• The template contains a date range property.
• The entity is going to be partially updated contains a date range with only the first date. In example ("03/07/206:").
• The partial update does not consider this date range but other properties.

The apparent reason is that update_partially gets all properties, add the new values to update respecting the others, and updates again every property. Then, trying to add again "03/07/206:", fails.