AEM 6.5 and AEM 6.5 Cloud – Min Number of Items in Content Fragment Model Not Enforced on Save (Old Editor)

I am using AEM 6.5 (Cloud SDK) with the old Content Fragment editor view.

In my Content Fragment Model, I configured a Fragment Reference field with the following settings:

• Render As: Multiple Field

• Min Number of Items: 2

• Max Number of Items: 4

However, when I create a Content Fragment based on this model, I am still able to:

• Add only 1 referenced fragment

• Save the Content Fragment successfully

• Max items works as expected

The system does not block the save operation even though the minimum number of items is set to 2.

My Questions:

1. Is this expected behavior in AEM 6.5 (classic/old editor)?

2. Are Min/Max item constraints only UI-level guidance and not server-side enforced?

3. Is there any way to strictly enforce the minimum item count without custom development?

4. Does this behavior differ in the new Content Fragment Editor or in AEM as a Cloud Service?

I also checked CRXDE under:

/conf/wknd/settings/dam/cfm/models/wknd-content-fragment-model

The minItems property is correctly set, but it does not prevent saving with fewer items.

Looking for clarification whether this is a known limitation or configuration issue.

Thanks in advance.