Compiler version
3.3.0-RC1-bin-20230109-f56089b-NIGHTLY
Minimized code
package test
trait Ctx
object Ops:
extension (i: Int)
def foo() = i + 1
extension (using Ctx)(i: Int)
def bar() = i + 2
extension (i: Int)(using Ctx)
def baz() = i + 3
Output

Expectation
The first (i: Int) in the signature of each extension should not be there