Note: This has been happening since 1.20 (i think), but I am reporting it now. Sorry if it is a duplicate (if it is).

So, villagers have an intelligence issue. Sometimes, villagers can't farm or harvest crops because they don't want to jump even though they can. If water (from the water source for the crops) is blocking the villager's way from farming or harvesting the crop, the villager will stay there and stare at the area they are trying to harvest or farm at. The villager, a while later, will attempt to use its intelligence to go around, jump, or attempt to move closer to the harvesting/farming area so they can successfully complete their job. That also applies to worksite blocks. The villager wander around the building outside, trying to get as close to the where they work at (the worksite block), and find an area outside of the building that is closest to their worksite block (even though the worksite block is actually inside the building).

I will edit this later, and add more information onto this bug report.