I'm Back doesn't trigger

Hi all, thanks in advance for your help. I’m far from new to smartthings, but I did move and stopped using the I’m Back and Goodbye automations, so I don’t know how long this has been happening. I trigger these two automations with Smartthings Presence Sensor (v2), in the standard everyone leaves, anyone arrives configuration. For whatever reason Goodbye! works fine, but I’m Back! doesn’t trigger. Interestingly it’s not the presence sensors, they both switch to present as soon as I get home, but the routine just doesn’t trigger! I’m using the ST classic app. Thoughts?