[Zek]

If it's any help, the only thing I did was summon and install. It has been effected by Synchro Summon and was supposed to be effected by Fight as One. Fast offense was used on it too. This is the only bonded youkai. Despite all this, the problems became apparent instantly, and I noticed it while using install first before anything else. I haven't touched this youkai in months, and I remember it being stable even after the update.

I used the same skills on other youkai (Haven't touched them for months too.) and they have yet to break.

However, while I was testing the non-broken youkai, I found another bug with them. They level up stats normally from the first jammer cave, but when they did it said
"The old campfire crumbles."
Instead of giving the stats they gained. Could be that there was a camp created on the overworld that spawned close to the battlefield and the fire just happen to go out at the same time, but still weird.

After leveling again, it actually said it leveled up, but still no stats shown in chat. It gained still.

Other problems listed in the first post still happens with them.