RE: Notes in Loading State for CRM 2015 on-prem
Hi Geeta Patel,
Is this cloned environment Online or OnPremise? If OnPremise, did you have a chance to collect any trace log files to llok for evidences?
You can also use Fiddler tool and F12 Dev console to collect more data during problem reproduction, also confirm if problem repro in other browser as well, so share your results with us.
--If your org is Online you can work with Support team to get platform traces and look for evidences.
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Giselle Oliveira
Support Engineer
Microsoft Dynamics CRM