Xverse signer rewards assigned to one signer only

[nieldeckx]

https://www.stacking-tracker.com/signers
xverse 2 and 3 do not have btc rewards..

For kiln 1 and 2 it does seem to work

[nieldeckx]

API issue:
https://explorer.hiro.so/signers?chain=mainnet
no addresses assigned to xverse