0.12.10 (test branch) - Level up delay

Playing on test branch (massivepatch), 0.12.10 - Steam - Windows

When creatures reach the exact amount of experience points they need to level up at the end of a battle, it will show their experience at max of required (IE: 100/100), but not notify of a level up (does not show next level or play level-up sound effect). The creatures do level up once the screen closes and you check your creature page.

Has happened multiple times, at multiple levels; not just, for example, leveling from 1 to 2.