The tracking shows unknown for open/click in the deliveries. This is not for all the records. For some of the record it shows device as PC/Phone. Any idea what could be the issue, This is a hybrid based setup so not sure Adobe support can help on it.
The logs are recorded by Adobe's tracking servers for hybrid deployments, so would be an Adobe Support issue if they weren't correct.
Is there any info in the other userAgent fields (@browserName, @OSName, etc)?
If I remember correctly the userAgent rules to recognize new devices are updated through the deliverability workflow since 2015 or 2016
If you have issues about, then:
1- be sure that the deliverability workflow is running
2- provide to ACC support all relative information from the nmsUserAgent schema for the line it is not correctly interpreted
3- wait someone from R&D update these rules and be patient