Very high gas cost for increasing pledged pool amount

[AronVanAmmers]

At one point in staking auction 3 I committed an amount to a pool, and then tried to increase this amount. The gas cost suggested was very high. I haven't seen the exact amount of gas that MetaMask estimated, just the cost. While this might be an issue with MetaMask, my first place to look would be the contracts.

Browser: Brave v1.1.22 (or v1.1.21, not sure when it updated)
web3 wallet: Brave Crypto Wallets (MetaMask fork)

Steps I followed (I have not tried to reproduce):

1. Commit an amount to a pool (approve transaction, pledge transaction)
2. Try to participate in this pool again. The staking UX says I already have an amount committed on this address, and I can increase it. Fill in a higher amount.
3. Confirm Approve transaction for higher amount
4. Proceed with transaction to increase pledge
5. MetaMask comes up with very high transaction costs (~$10 as the lowest):