On an ITCM Domain/Enterprise, the Microsoft SQL Server Instance Name and port number are stored in comstore.
If SQL Server Instance is using Dynamic port, port number could change and value in comstore may become wrong.
This could cause problem when some process are using the port found in comstore.
As documented in following docops link, usage of a SQL static port is recommended for ITCM
Choose a static TCP port for SQL Server instance. Port for Default SQL Server Instance is generally 1433.