Name not displayed in Dual WhatsApp

Hello,

I have enabled dual WhatsApp in my Samsung M51. But the names are not getting displayed for some. I have 2 sims, one personal and the other for office use. The names are getting displayed properly for my personal WhatsApp, but for my office WhatsApp. Also note, the numbers are saved in Google contacts differently for both my personal contacts and office contacts.

I tried adding all my office colleagues' cell numbers to my office google contact. Their numbers are not saved in my personal google contacts. But still few contact names aren't showing up.