I'm also having the same issue. My village started flourishing in 1.14.2, mostly due to multiple villagers using the same workstation, even though villager rules state one villager per workstation. Now, in 1.14.3, I've noticed that I can only trade with the most recently employed villagers because those are the only ones at their workstations, as the elder villagers just wander around the village and I can't trade with them at all. They don't go back to their stations, or at least I haven't observed them long enough for them to do so
Jakene
I'm also having the same issue. My village started flourishing in 1.14.2, mostly due to multiple villagers using the same workstation, even though villager rules state one villager per workstation. Now, in 1.14.3, I've noticed that I can only trade with the most recently employed villagers because those are the only ones at their workstations, as the elder villagers just wander around the village and I can't trade with them at all. They don't go back to their stations, or at least I haven't observed them long enough for them to do so