Baby prefers daddy?!

My 7.5 month old son is poorly ATM and always been very attached to both me and his dad. Not shown a preference in anyway really and never been upset in my arms… However, just this morning my partner went up to him as he’d woken from a nap (he’s poorly atm with a horrible cold) and I came up after to take over and when I took him from my partner he screamed his head off, I tried to sooth him but he clearly wanted his dad so I didn’t want distress him so handed him back and he stopped crying instantly… Later on the same happened when I went to take him off my husband to give him a break… I’m a bit concerned this means he doesn’t have a strong attachment to me or doesn’t feel safe with me? I am his main caregiver and generally a very calm, consistent and loving mummy. I know it shouldn’t matter and that I should just be happy he’s so attached to his dad but I do feel like there May something up as he’s so young, I thought babies, particular when ill, always wanted their mums… this was the case with my firstborn anyway… 💔