[Firebird 3.0] [FirebirdClient 9.1.1] [FbTrace] ServiceOutput is not working

Steps to reproduce:

Given:

Firebird 3.0 database setup:

install Firebird Server 3.0.10 (x64) on Windows 10 with default configuration https://firebirdsql.org/en/firebird-3-0-10/
create an empty database https://firebirdsql.org/manual/bk02ar08s06.html
add some test table to a newly created database

.NET 6.0 Console App setup:

create new console app (.NET 6.0) using dotnet new console -f net6.0
add Firebird Client (9.1.1) package using dotnet add package FirebirdSql.Data.FirebirdClient --version 9.1.1
configure FbTrace to look for all insert/update/delete sql statements
```
// Create new tracer instance
var trace = new FbTrace();
```

trace.ConnectionString = "database=[DB_PATH];user=SYSDBA;password=[Password]"; trace.ServiceOutput += (object? sender, ServiceOutputEventArgs e) => { Console.WriteLine("Logged: " + e.Message); // called only once with message "Trace session ID 1 started" and never again }; trace.DatabasesConfigurations.Add( new FbDatabaseTraceConfiguration() { DatabaseName = string.Empty, Enabled = true, Events = FbDatabaseTraceEvents.StatementFinish, IncludeFilter = "%(INSERT|UPDATE|DELETE)%", TimeThreshold = TimeSpan.FromMilliseconds(0), });

trace.Start($"trace-{Guid.NewGuid()}");



**When:**
- New row is added to a table using any means

**Then:**

Expected behaviour:
-  trace.ServiceOutput handler's body `Console.WriteLine("Logged: " + e.Message);` is called every time there is an insert/update/delete statement executed on database

Current behaviour:
- trace.ServiceOutput handler is called only once at trace start and never again

Additional info: 
- Provided solution works with Firebird 2.5
- I've noticed that Trace mechanism has been updated in Firebird 3.0, but I don't know if I should change something in my setup https://www.firebirdsql.org/rlsnotesh/rlsnotes30.html
- according to https://github.com/FirebirdSQL/firebird/issues/7518 potential problem might be with missing remote protocol prefix when defining a service name

FirebirdSQL / NETProvider

[Firebird 3.0] [FirebirdClient 9.1.1] [FbTrace] ServiceOutput is not working #1098