Bhat et al. report the detection of a glitch in the millisecond pulsar (MSP) PSR J0900−3144, which is included in the European, MeerKAT and Parkes pulsar timing array (PTA) experiments. The dataset combines observations from the MeerKAT, Nançay, Lovell, and Murriyang telescopes, spanning a total baseline of approximately 14 years. This event represents only the third glitch detected in a MSP. Using simulations, the team demonstrate that relatively small glitches like this one can go undetected, especially in short datasets such as those from new PTAs, and can bias the inferred achromatic noise model parameters, potentially leading to the down-weighting of the pulsar in gravitational wave background searches. The image above shows a comparison of timing residuals for PSR J0900−3144. The top panel shows the frequency averaged pre-fit residuals, clearly highlighting the glitch event. The second panel presents the frequency averaged uncertainty-weighted post-fit residuals after subtracting the glitch model. The vertical dashed line marks the glitch epoch, around 29 December 2022.