5498-SA Prior Year Box 3 Amounts now shows in Box 2 as Same Year

5498-S Box 3 (Contribution for Prior Year),   should this amount persist in the NEXT year's Box 2  ?

 

Scenario:  

In early 2024,  applied post-paid contribution to 2023 HSA year. 

 

2023 5498-SA eventually shows Box 3 --- reflecting the contribution for prior year

2024 5498-SA arrives and the 2023 Box3 amount shows in Box 2 as current year contribution.

 

Is this a custodian error?

If not, how is it inferred that the 2024 Box 2 amount is really the Box 3 amount from 2023 ?