I am having an issue with a ambient audio track spiking when played with another clip on a separate audio track. Please watch this video I captured on frame.io for insight on the problem and a more fleshed out explanation.
Sorry to sound like a broken record, but adding information like that really helps.
Please see this superb example for reference - you don't need to go quite this far, but the more information you can give the better really. As a bare minimum we need Computer specs, OS, OS version, Premiere version, Project Settings, Export settings plus any other details that may help - especially if there are things you have already tried that failed.