If I cure a villager that was recently turned into a zombie, it chooses a different job site while keeping its profession. I had a butcher that worked on a lectern, and a fletcher that works on a barrel.
I broke the lectern, and the butcher chose a stonecutter as a job site. Then I broke that and the villager chose a couldron. I broke that too, and it returned to its original job site.
The behaviour of the other villager was similar.
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However, this issue is Invalid.
Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.
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