Hi,
Hope you're running SNP
Presume you've activated the SNP GR processing time for consideration in Global settings of SNP.
Check whether you've a Handling Resource defined in the receiving location and the Resource have been assigned to a factory calendar.
Handling resource should be mixed resources with infinite capacity planning.
OR
Check whether the receiving location has the receiving calendar maintained or not.
Just my thoughts... Try making the changes and share the result.
Regards
Vinoth