I encountered following bug with Bizzy's quest:
At stage 4 of the quest (flat-chest route) [Save1], after she's given 200,000 credits, a field appears to enter a name for her studio. If you enter a name that's too long, a warning appears stating that the name can't exceed 16 characters.
Then, if you shorten the name and continue the dialogue (by selecting any options), the quest is irreversibly broken:
Immediately after leaving her apartment, the player receives a letter from Bizzy informing them that they will now receive royalties:

However, we've already received this letter in one of the previous stages! The letter mentions "busty kaithrit" instead of "mosquito-bitten kaithrit," meaning the quest jumps from the flat-chest route to the busty route:

Bizzy herself remains flat-chested, although "Encounters" journal entry now states she has a J-cup, and the quest has advanced to stage 5. Also, the dialogue in her apartment gets stuck in a dead loop, allowing the player to endlessly transfer 200K to her over and over again [Save 2].
This bug, however, ONLY and EXCLUSIVELY occurs if the studio name length warning was triggered. If the name was entered correctly, the quest will advance to stage 5 without any issues. [Save 3]
At stage 4 of the quest (flat-chest route) [Save1], after she's given 200,000 credits, a field appears to enter a name for her studio. If you enter a name that's too long, a warning appears stating that the name can't exceed 16 characters.
Then, if you shorten the name and continue the dialogue (by selecting any options), the quest is irreversibly broken:
Immediately after leaving her apartment, the player receives a letter from Bizzy informing them that they will now receive royalties:

However, we've already received this letter in one of the previous stages! The letter mentions "busty kaithrit" instead of "mosquito-bitten kaithrit," meaning the quest jumps from the flat-chest route to the busty route:

Bizzy herself remains flat-chested, although "Encounters" journal entry now states she has a J-cup, and the quest has advanced to stage 5. Also, the dialogue in her apartment gets stuck in a dead loop, allowing the player to endlessly transfer 200K to her over and over again [Save 2].
This bug, however, ONLY and EXCLUSIVELY occurs if the studio name length warning was triggered. If the name was entered correctly, the quest will advance to stage 5 without any issues. [Save 3]