Hi @ELango :
I've made a test but did not encountered the problem you mentioned:
I assume there is a table:
ClearCollect(
'User Allocations',
{'Project Name':"Thorrol",'User ID':{'User ID':User().FullName},'End Date':Today(),'Start Date':Today()},
{'Project Name':"Sitling",'User ID':{'User ID':User().FullName},'End Date':Today(),'Start Date':Today()},
{'Project Name':"Para",'User ID':{'User ID':User().FullName},'End Date':Today(),'Start Date':Today()},
{'Project Name':"Sky",'User ID':{'User ID':User().FullName},'End Date':Today(),'Start Date':Today()}
)
Filter and Sort the table:
Sort(Filter('User Allocations','User ID'.'User ID'=User().FullName,'End Date'>=Today()&&'Start Date'<=Today()),'Project Name',Ascending)
The Result:

If the problem still exists, I suggest you create a support ticket for professional assistance following the below procedure.
Get Help + Support - Power Platform | Microsoft Docs
Best Regards,
Bof