When executing the OFC action immediately or asynchronously in Record-Trigger Flow, multiple records cannot be created/updated in batch. When calling an OFC action when creating or updating multiple records in bulk, an error "The number of results does not match the number of interviews that were executed in a single bulk execution request." will occur.
To create or update multiple records in a batch from a data loader or program, run the Scheduled Path with a batch size of 1.
About Schedule-Triggered Flow
OFC actions cannot be used in a Schedule-Triggered flow. If you want to use it in a Schedule-Triggered Flow, update the record in the Schedule-Triggered Flow and call the OFC action in the Record-Triggered Flow. 1. Create Record-Triggered Flow Execute OFC action with batch size 1 in Scheduled Paths 2. Create Scheduled-Triggered Flow Update with the conditions of the created Record-Triggered Flow Memo Record-Triggered-Flow should be executed with a batch size of 1 in Scheduled Paths. Even if you update one record at a time by loop processing in the Schedule-Triggered Flow, multiple records will be passed to the Record-Triggered-Flow in a batch. This is due to Salesforce's specification for Flow Bulkification.
Instruction manual
Use in Record-Triggered Flow (PDF)