ruby barn
Reproduction Steps : Achievement triggered when gifting Betty on Spring 27 year 1
Repro Rate : N/A
Game Platform : Steam
Game Version v1.1b- 1231
Input Mode : N/A
I definitely have not gifted all of the townies. There are many I haven't gifted at all, yet, so I'm not sure why this triggered.
edgy frigate
Hello @ruby barn! We've received a similar report here https://discord.com/channels/623097219628662784/1310722485427114066. Could you please add your info and your SaveGames folder in a zip file there? 
To find it, you can copy-paste this file path to the File Explorer: %localappdata%\ProjectCoral\Saved\SaveGames