This^ 100% makes sense and I've read about and seen it happen in a garden. What happens with HpLVD is the infection takes time to spread around to every part of the plant. So younger cuts that have just been vegging for a couple weeks might have fans that pass the hop latent viroid test but that same cut tested when it been vegging at 1.5 months or over could get tested and have all different parts of the plant coming back positive for HpLVD, this is why it has gotten past some growers. Growers have tested their plants and got back negative results for HpLVD but then plants completely dudded out in flower and they where left scratching their heads, there are newer more efficient testing for hop lantent now like root samples.
Also know what to what to look for- not any vertical growth-lateral growing shoots, branches snapping easily flower, plant just completely shitting the bed in flower by day 45., no trichome production or terps. If a plant is positive for HpLVD belive and trust it will show itself, most will notice once they are in flower.
