DD13 oil pressure

DD13 engine running 5-10PSI oil pressure at idle after changing engine oil and filters. Alarm and engine shutdown. Detroit diesel correct filter used with 10w30 oil. By pass valve at top of filter seems to be working and springs back. Ran a mechanical gauge from oil pressure port and still 5-10PSI. Should there be a check valve at the bottom of the filter housing? No issues before the oil service.

 

2015. 173k mi. Different tech did the service. I did see him replace the oil filter and everything looked correct when I took the filter out to double check. Unless the stand pipe has a small crack somewhere we cant see. Open port on the bottom inside of housing next to the stand pipe. We dont do much with DD.