 Quantum computing relies on controlling large numbers of qubits with high fidelity. Spin qubits are compatible with semiconductor fabrication and can achieve high fidelity operations above 99.9%, but their performance drops when driving multiple qubits simultaneously. This study provides important insights into the reliability of quantum computing operations and will help researchers scale up quantum information technology. This article was authored by W.I.L. Lorry, M. Rimbarkras, F. Van Riegelen, and others.