Villagers not restocking trades

Villagers having trouble pathfinding to their workstation to restock trades-with my testing, they cannot see their workstation and restock if there is a block above their head, even a slab. The villagers on my realm are in minecarts, but I tried the same thing with them just standing on solid ground and they still could not pathfind to their workstation to restock trades. The only way I've been able to get them to restock is by removing all the blocks surrounding them and place the workstation right behind them.