-Steam
-lng_bulbous_lightman
-Occurs everywhere
-Was using the karakuri staff on a training bear when first occurred
-Time irrelevant
-Occurs 100% of the time
-Despite patch notes from yesterday saying 'Fixed an issue in which the mutation level of the karakuri staff could be accumulated above the maximum indicated', this still seems to happen in very specific contexts - if the player pulls off any mutation attacks after maxing their bar, the gauge will still increment by 1, though it is not represented on the UI.
If the player used their regular juggernaut blade attack, all the charges will b used as expected; however, if they use the Full-body Slam off a crate or the glider, or the Full-body Cleave off a spring, the attack will use these invisible charges and not take 4 bars from the gauge as expected. This occurs in all areas of the game, though is easiest to reproduce in Minoto.
-Steps to reproduce: Load into Minoto->Equip a karakuri staff->Fast travel to the training bear->Initiate regular training->Combo into mutation attacks, such that the mutation gauge is filled->Perform 4 more mutation attacks, granting 4 'invisible' charges in the background->Place a karakuri crate->Jump off the crate and use the Full-body Slam attack.
Observe the Full-body Slam attack is executed, but because these 4 'invisible' charges were used, the player still has a full mutation gauge.