If you are removing liquidity and experiencing a longer processing time than usual. It's likely that your transaction has triggered the redeem local function that requires two cross-chain messages to complete the transaction.

It takes one message from source chain to another chain then another message from the other chain to source chain. If the other chain is Polygon then the processing time could take around 20-30 minutes as it requires 512 block confirmations on Polygon for security reason. If the other chain is Ethereum, a higher gas fee is expected. You can check the fee before you remove the liquidity.

The algorithm decides on which chain to go.

Please see this Tweet for a detailed explanation on how the mechanism works.

https://twitter.com/PrimordialAA/status/1505320310987440136?s=20&t=BClcTduL9SzE8zwcbujp7g