When 1.17 came out, I started a brand new world. I came across a village that had 4 leather workers in it, all in the same building. Thought that was odd so I loaded the save in chunkbase and found a few more villages to visit. Every one of them had this problem, and in fact, the village I ended up settling in had TWELVE leather workers and NO farmers. I had to remove the extra cauldrons to reset them and gave them other jobs. 

Never saw this problem before 1.17. The seed number is 268047059

The village in question is located at 4370 1197, which is extremely far east of the starting spawn.