Freedom UI Lookup Filter

I am trying to add a filter on the lookup owner based on the account field, but the filter is not working. Does anyone have an idea why?

Thanks!

handlers: /**SCHEMA_HANDLERS*/[
        {
            request: "crt.LoadDataRequest",
            handler: async (request, next) => {
                // filter the contact lookup for the account
                             
                if(request.dataSourceName !== "LookupAttribute_85sj3qr_List_DS") {
                    return await next?.handle(request);
                }
         
                // get the account                  
                const account = await request.$context.Parameter_q8l08xk;
                if (account) {
                    const filter = new sdk.FilterGroup();
                    await filter.addSchemaColumnFilterWithParameter(sdk.ComparisonType.Equal, "Account", account.value);
         
                    
                    const newFilter = Object.assign({}, filter);
                    newFilter.items = filter.items;
         
                    request.parameters.push({
                        type: "filter",
                        value: newFilter
                    });
                }
                             
                return await next?.handle(request);
            }
        }
            
        ]/**SCHEMA_HANDLERS*/,