I had a vvvv faint line this morning on a one step test, So I thought I'd retest this evening after a 5 hour hold.
After the 5 minute time frame, it was negative, I jumped in the bath, checked again and there was a faint, pink line.
I've been ttc for years, so i know the probability of this being an evap, but when you get to my age, you cling on to any hope!
This was at the 20-25 minute mark.