It is good to add a require() statement that checks the return value of token transfers or to use something like OpenZeppelins safeTransfer/safeTransferFrom unless one is sure the given token reverts in case of a failure. Failure to do so will cause silent failures of transfers and affect token accounting in contract.
Reference: This similar medium-severity finding from Consensys Diligence Audit of Fei Protocol: https://consensys.net/diligence/audits/2021/01/fei-protocol/#unchecked-return-value-for-iweth-transfer-call
ForgottenRunesWarriorsGuild.sol#L175
Consider using safeTransfer/safeTransferFrom or require() consistently.
