A fix for LMD [[balancing attacks]] technique introduced as a mitigation to help coordinate the voters in slots with an honest proposer Honest voters temporarily grant extra weight to current proposal The proposer score boost boosts the LMD score of blocks that are received in a timely manner. If a block for slot X is received in the first (Seconds per slot / intervals per slot = 4) seconds of the slot, then the block receives a boost for the duration of the slot Mitigates balancing attack on Gasper, attacking Gasper without adversarial network delay, and three attacks on PoS Ethereum