On ICX / sICX trading pair, the deposited ICX amount can be converted into sICX after a swap from a random trader and the liquidity provider does not earn reward anymore. In this case, they will have to manually unstake sICX or trade sICX to ICX and supply liquidity again. Optimus will monitor and automate this entire process, the protocol will unstake and deposit again as soon as the ICX amount is available to claim.