TransactionScope throws NullPointerException when attepting to commit

[KalaMariaHirmo]

I attempted to make every Ktor pipeline its own transaction for atomicity.
My code:

this.intercept(ApplicationCallPipeline.Monitoring) {
    val transaction = manager.newTransaction(manager.defaultIsolationLevel)
    proceed()
    transaction.commit()
    transaction.close()
}

Thanks to coroutines the transaction I wanted to commit didn't match with what TransactionManager.currentOrNull() gave and it sometimes ended up being null. Resulting in this line in Exposed throwing a NullPointerException.

I managed to solve the issue by using suspended transactions like this:

this.intercept(ApplicationCallPipeline.Monitoring) {
    newSuspendedTransaction {
        proceed()
    }
}

The problem is that Exposed still allows a NullPointerException to be thrown.

[Tapac]

Is the problem in NPE or that it throws at all? I can replace it with IllegalStateException when transactionScope used outside the transaction.

[KalaMariaHirmo]

The problem is in the NPE