Power App Multiselect Lookup Field

 I am doing multiselect lookup in power apps.

Multiselect Lookup control PCF now available in Dynamics 365 CRM | Microsoft Dynamics 365 CRM Tips and Tricks (inogic.com)

this is a link to PCF control for multi-lookup(N2N) that i m implementing. it is showing the values in that field but on save of record, all lookup values are disappeared. When i tried to update the existing records, the record was properly saved with values in lookup field. main error is that its not working in "New Form" mode.

Please help me to do this.

Thanks in Advance