To help ensure that users who are viewing reports and dashboards are who they say they are, DR should require a high assurance session when exporting or printing reports and dashboards. A high assurance session requires users to verify their identity using multi-factor authentication before accessing sensitive data or functionality in Salesforce. References: https://help.salesforce.com/s/articleView?id=sf.
security_high_assurance_session_level.htm&type=5

A record-triggered flow lets you automate actions when a record is created or updated. You can use scheduled paths to schedule actions relative to a date field on the record, such as close date. You should configure the trigger to flow after the record is saved so that you can access the updated field values. References:
https://help.salesforce.com/s/articleView?id=sf.flow_concepts_trigger_types_record.htm&type=5

When you have multiple record-triggered flows that are configured to run before the record is saved on the same object, the order of flow execution is unpredictable. This means that you cannot guarantee which flow will run first or last, or how they will affect each other's field updates. Therefore, you should avoid creating multiple before-save flows on the same object and instead consolidate them into one flow if possible.
References: https://help.salesforce.com/s/articleView?id=sf.flow_considerations_recordtriggered_before.
htm&type=5

A matching rule is a rule that defines how records are compared for duplication based on certain fields or fuzzy logic. By including more fields or changing the matching method, you can make the matching rule more or less strict and reduce false positives or negatives. In this case, including the email field to the existing matching rule for contacts can help avoid duplicate messages for common names by checking if the email addresses are also identical. References: https://help.salesforce.com/s/articleView?id=sf.
matching_rules_create.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.
matching_rules_considerations.htm&type=5

The flow debug option is a tool that allows you to test and troubleshoot your flow by running it in debug mode and inspecting the values of variables and resources at each step. You can also set the debug mode to run as another user and see how the flow behaves for different users with different permissions and settings.
In this case, using the flow debug option and setting the selection to run as another user can help identify why one user is experiencing a flow error while others are not.
References: https://help.salesforce.com/s/articleView?id=sf.flow_debug.htm&type=5