Sometimes the prompt for Deity Summoning in the Hualiu boss fight fails to appear, causing a softlock since you cannot finish the battle without triggering it. Reloading a save seems to fix this. Saving before the fight and reloading that save seems to prevent it from happening at all.

The weapon "Mineral" that you can buy for Xiu Wu from the shop at the Bottom of Duzhang Spring is bugged. When you equip it it will be as if you have no weapon equipped and he will not be able to attack in battle! This happened on the PS5 version, it is unconfirmed on other versions.