qiskit/releasenotes/notes/2.0/fix-global-phase-assign-d05...

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---
fixes:
- |
Fixed a series of bugs when processing circuit with parameterized global phases,
where upon assignment the global phase was not correctly assigned.
Known cases this affected include:
* assigning parameters after calling :meth:`.QuantumCircuit.decompose` on a circuit,
where the decomposition introduces a global phase
* assigning parameters on a circuit constructed from a DAG via :func:`.dag_to_circuit`
* assigning parameters on circuits created with :func:`.pauli_twirl_2q_gates`, where
the circuit to be twirled had a parameterized global phase
Fixed `#13534 <https://github.com/Qiskit/qiskit/issues/13534>`__.