VDP Restore Thin-Provisoned as Thick-Provisioned ?

Hi, Community.

I'm currently use VDP 5.1.10 to backup my environment.

and I try to restore vm from backup but have some problem.

almost of vm in my environment is thin-provision disk but when I restore VM from VDP my VM turn in to thick-provision.

my question is

Is it normal ?? when restore thin-provision VM it'll turn into thick-provision ? or it must still thin-provisioned ?

if it's can restore as thin-provision How do I troubleshoot this issue.

thanks in advance.