Cronjob Seconds Show on UI but Not Executable?

I just realized something interesting without knowing. As per docs, Cronjobs are only allowed precision up to the minute. I accidentally have a cronjob run every 15 minutes on the 30th second. The dashboard Settings shows exactly the correct information as stated (1st image) up to the second but the Schedule page only shows up to the minute (2nd image) I just realized my code hasn't been running because I provided a second variable (1st image) but it does not show any error. This is intentional isn't it as per the previous post I made Cronjobs on Railway do not provide to-the-second accuracy? Perhaps we can add something on Settings that will state seconds is not supported or something?