Why does /proc/swaps show incorrect value of size if swap is greater than 4TiB?

Issue

• Why does /proc/swaps show incorrect value of size if swap is greater than 4TiB?

# free
              total        used        free      shared  buff/cache   available
Mem:       65550584     4263592    60050176       21484     1236816    60721832
Swap:    4294971388           0  4294971388

# cat /proc/swaps 
Filename                Type        Size    Used    Priority
/dev/dm-1           partition       4092        0      -2