The primary neutral connection needs to be tight and corrosion-free; a jeopardized neutral can trigger voltage imbalances

https://fernandowfzy451.clearhavendigest.com/posts/the-role-of-the-electrical-panel-in-home-electrical-systems

The primary neutral connection must be tight and corrosion-free; a compromised neutral can cause voltage imbalances, destructive appliances and sensitive electronics.