[Mivereous]

This weapon was already upgraded to +6 in all aspects, but now the Current Crit bar in the Upgrade menu looks like this. I can add another +6, but I didn't have enough murai to test it. As you can see, it already has a mod of 6, which is its original upgrade, and nothing else is influencing that mod - no parts, no qualities, no enchants/curses, and Ether. I tried clearing cache to no effect, and this is the same on all of my characters.

[Rendar]

It'll cap out at +6, or should, on a relog.

[Neus]

This has been corrected. My advice is to not upgrade crit until the next update, since it won't actually apply.