The quest “The Way of the Weaponsmith” is not available if you did “The Art of the Armorsmith” before the latest patch, but both quests are available for new characters, I checked with my guildmate.
Same for other way around too I think
I managed to pick up the extra weapon specialization I was missing and just started doing the armor quests but not sure how far it will let me go yet before it bugs.
I’m not sure If I should wait to start doing the armor quest s though in case I have to repeat them for some reason
Hopefully this is a fairly easy fix for them and should be sorted soon