If you’re planning on riding the GO Transit Lakeshore East and West train lines on Sunday, Metrolinx is warning you could face delays as the broader rail network deals with “crew constraints.”According to a statement issued by Metrolinx staff Sunday morning, both train lines will see 30-minute service throughout the day.The statement also said other train trips across the GO Transit rail network might be cancelled or delayed.Metrolinx staff didn’t elaborate on the extent or the nature of crew shortages.“We thank our customers for their patience during this weekend’s service disruption,” the statement said.Riders were encouraged to monitor the GO Transit service updates website for the latest updates affecting train service.