Question about persistent DB connection, the LAST_INSERT_ID

HI, the question is whether there is any chance the LAST_INSERT_ID
could be wrong during inserting with a persistent DB connection?

For example, instance [AA] of a script insert one row with an
auto-increment field, and retrieve the LAST_INSERT_ID after the
operation, at the same time, there is another instance [BB] of the
same script doing the same thing. Giving that the sequence happens as
indicated below for reason that [AA] somehow runs a little slower
after inserting.

[AA] insert
[BB] insert
[BB] select the LAST_INSERT_ID (IDB)
[AA] select the LAST_INSERT_ID (IDA)

Will the [AA] still have the correct LAST_INSERT_ID when the DB
connection is a persistent one?

Thanks for help.
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