A village that I built a wall around seemingly randomly despawned all villagers, and the grass paths throughout the village deleted themselves. It was a fairly thriving village until I went to it to trade and found it completely destered. All possibly relevant contextual information is here:

• I built a 2-block-tall wall around the village, some parts cutting over some grass paths. I didn't think this would've been a problem as the wall was previously smaller, breaking the village into two parts and leaving out a house and a few structures
• I completed a raid in the village - all villagers survived
• The closest I came to interacting with the village since it deleted itself was going past it a few times
• I destroyed quite a few grass paths the last time I saw the village before it self-destructed (it was only one pathway that I was going to redirect to stay within the wall)
• I didn't destroy any beds or doors at any point, and I added more job site blocks than there previously were
• I didn't light up the inside of the area very well, so I suppose the village could've been overrun while I wasn't paying attention, but I didn't spend more than 20 seconds within 100 blocks of it while it was nighttime and even if the village was overrun, the grass paths deleting themselves is either a bug or a bad mechanic - it would make more sense to keep the grass paths, or have them turn into something else, such as grass blocks
• The seed for the village is 6891251631081569539 and the coordinates are -356 66 -300
• The attachment shows the 3 block wide gouges in the village where the paths were, with the odd remaining grass blocks in them, as they were when the paths were still there