I know this questions is already asked, but the solution provided is not proper. So asking the question again.
We created a custom assets with name FOC. when we send any FOC to any account, the balance of asset is not being updated. we created 1000000000, and we have sent payments to other accounts as well, but the balance is not being updated.
You can see the balance here.
https://horizon.stellar.org/accounts/GD57ZNS2KGQWJMCUOSAVQH5QXBARDC3ISAK66I3SUYXPCDZ44G2FBD3P
You can see a payment transaction made here https://steexp.com/account/GCUBPFP7PSJG7ZNLC64HAAKRB3E23OCUW2TJIJ4WYTPFXHKQEZQIC2YS#payments
but the balance is still same, we have done lots of other payment transactions but it keeps the same balance.