Do you mean power valve plug or manifold? I’m assuming you mean power valve because you mentioned ignition side. Yes, it’s common for them to leak, but it’s usually not a huge performance problem… just a mess and it’s hard to do a proper leak test.
If you only put rtv on the exterior, try pulling it from cylinder, swab in rtv and re-install. Be sure to cleanup any excess rtv inside cylinder. If it’s an o-ringed type, put a new o-ring on it.