Inverter-based resources (IBR) performance issues and modelling deficiencies have been documented in the NERC alerts from 2023 to 2025. NERC disturbance reports have also found that the existing models are unable to reproduce the IBR behaviours during the reported events. The authors have attempted to replicate a local voltage-reactive power oscillation event in a high IBR-penetration area by modelling the local transmission system and IBRs in electromagnetic transients (EMT) domain. The work highlights the criticality of metering delay representation and modelling the discrete nature of the power plant controllers in reproducing and predicting stability. The event replication in system simulation demonstrates that representing the metering delay as the first order lag function, which is the most common representation in standard library positive sequence models used in the western interconnection of the US, was inadequate for IBRs, especially those with large delays in feedback signals.