I have a world first created in the 21w39a snapshot, and upgraded up to 1.18 pre-1, and now playing on the new launcher.
The chunk is in a village. the grass i break, sugarcane and looms i place are all reset everytime you quit.
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We're tracking this issue in MC-241204, so this ticket is being resolved and linked as a duplicate.
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The chunk saving has been fixed, although the 2 villagers whose workstations were in the chunk and removed are still shepherds, who still think that their workstation is where it was placed, where it doesnt exist.
I'm not too sure but I believe this is a duplicate of MC-241204 which has been fixed in 1.18 Pre-release 2. Please do correct me if I'm wrong though. 🙂