I am not using acs at all in my cq.dialog xml. Below is the cq dialog.xml. I have 2 tabs, each tab has multifield. After some certain count multifield is breaking not loading all items in dialog to edit them.
<?xml version="1.0" encoding="UTF-8"?>
<jcr:root xmlns:sling="http://sling.apache.org/jcr/sling/1.0" xmlns:cq="http://www.day.com/jcr/cq/1.0" xmlns:jcr="http://www.jcp.org/jcr/1.0" xmlns:nt="http://www.jcp.org/jcr/nt/1.0"
jcr:primaryType="nt:unstructured"
jcr:title="Multifield"
sling:resourceType="cq/gui/components/authoring/dialog">
<content
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/container"
class="dialog-width-50rem">
<layout
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/layouts/tabs"
type="nav"/>
<items jcr:primaryType="nt:unstructured">
<basic
jcr:primaryType="nt:unstructured"
jcr:title="Basic"
sling:resourceType="granite/ui/components/foundation/section">
<layout
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/layouts/fixedcolumns"/>
<items jcr:primaryType="nt:unstructured">
<column
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/container"
class="column-full-width">
<items jcr:primaryType="nt:unstructured">
<fieldset
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/fieldset">
<layout
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/layouts/fixedcolumns"/>
<items jcr:primaryType="nt:unstructured">
<column
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/container">
<items jcr:primaryType="nt:unstructured">
<items
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/multifield"
fieldDescription="Click 'Add field' button to add a new field."
fieldLabel="Social Icons List"
limit="200">
<field
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/fieldset"
eaem-nested=""
name="./items">
<layout
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/layouts/fixedcolumns"/>
<items jcr:primaryType="nt:unstructured">
<column
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/container">
<items jcr:primaryType="nt:unstructured">
<title
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/textfield"
fieldLabel="Social Title"
name="./socialTitle"/>
<icon
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/select"
fieldLabel="Select Social Icon"
name="./socialIcon">
<items jcr:primaryType="nt:unstructured">
<select
jcr:primaryType="nt:unstructured"
text="Select Icon"/>
<facebook
jcr:primaryType="nt:unstructured"
text="Facebook"
value="facebook"/>
<linkedin
jcr:primaryType="nt:unstructured"
text="Linkedin"
value="linkedin"/>
<twitter
jcr:primaryType="nt:unstructured"
text="Twitter"
value="twitter"/>
<googlePlus
jcr:primaryType="nt:unstructured"
text="Google +"
value="google-plus"/>
</items>
</icon>
<openInNewTab
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/checkbox"
name="./openInNewTab"
text="Open In New Tab"
value="_blank"/>
</items>
</column>
</items>
</field>
</items>
</items>
</column>
</items>
</fieldset>
</items>
</column>
</items>
</basic>
<advance
jcr:primaryType="nt:unstructured"
jcr:title="Advance"
sling:resourceType="granite/ui/components/foundation/section">
<layout
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/layouts/fixedcolumns"/>
<items jcr:primaryType="nt:unstructured">
<column
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/container"
class="column-full-width">
<items jcr:primaryType="nt:unstructured">
<fieldset
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/fieldset">
<layout
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/layouts/fixedcolumns"/>
<items jcr:primaryType="nt:unstructured">
<column
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/container">
<items jcr:primaryType="nt:unstructured">
<items
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/multifield"
fieldDescription="Click 'Add field' button to add a new field."
fieldLabel="Social Icons List"
limit="200">
<field
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/fieldset"
eaem-nested=""
name="./advance">
<layout
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/layouts/fixedcolumns"/>
<items jcr:primaryType="nt:unstructured">
<column
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/container">
<items jcr:primaryType="nt:unstructured">
<title
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/textfield"
fieldLabel="Social Title"
name="./socialTitle"/>
<icon
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/select"
fieldLabel="Select Social Icon"
name="./socialIcon">
<items jcr:primaryType="nt:unstructured">
<select
jcr:primaryType="nt:unstructured"
text="Select Icon"/>
<facebook
jcr:primaryType="nt:unstructured"
text="Facebook"
value="facebook"/>
<linkedin
jcr:primaryType="nt:unstructured"
text="Linkedin"
value="linkedin"/>
<twitter
jcr:primaryType="nt:unstructured"
text="Twitter"
value="twitter"/>
<googlePlus
jcr:primaryType="nt:unstructured"
text="Google +"
value="google-plus"/>
</items>
</icon>
<openInNewTab
jcr:primaryType="nt:unstructured"
sling:resourceType="granite/ui/components/foundation/form/checkbox"
name="./openInNewTab"
text="Open In New Tab"
value="_blank"/>
</items>
</column>
</items>
</field>
</items>
</items>
</column>
</items>
</fieldset>
</items>
</column>
</items>
</advance>
</items>
</content>
</jcr:root>