logger is not filtering ib_async messages

[genec1]

I get a ton of "Error 200 No security definition" errors and "Unknown contract" warnings when trying to retrieve an option chain.
I am trying to use logging.getLogger().addFilter() to block these, but it's not working. Or, rather, it worked in a Jupyter notebook, but not in the script based off of that code.

class IgnoreUnknownContractFilter(logging.Filter):
    def filter(self, record):
        the_error = record.msg
        if ("Unknown contract" in the_error or
            "No security definition has been found" in the_error or
            "Error 200" in the_error):
            return False
        else:
            return True

# Add the filter to the root logger or a specific logger
logging.getLogger().addFilter(IgnoreUnknownContractFilter())

I tried adding this additional code, but it didn't help:

    # move logger into my mail logging function
    ibasync_logger = logging.getLogger('ib_async')
    ibasync_logger.addFilter(IgnoreUnknownContractFilter())
    ibasync_logger.propagate = True

The errors and warnings are coming from qualifyContractsAsync:

  strikes = [strike for strike in chain.strikes if 0.5 * spx_value <= strike <= 1.5 * spx_value]
    rights = ["P", "C"]
    valid_contracts = []
    for right in rights:
        for strike in strikes:
            contract = Option(
                "SPX",
                earliest_date,
                strike,
                right,
                "CBOE",
                tradingClass="SPXW",
                multiplier="100",
            )
            # Qualify the contract to ensure it is valid
            if contract and await ib.qualifyContractsAsync(contract):
                valid_contracts.append(contract)