Overgrown Shrine Boss Cannot be Killed

Description:
Upon reaching Maligaro in the Overgrown Shrine (mine was specifically T12), then getting him to his clone phase, if you click on a Ritual Altar during that phase, you will not be able to complete the fight as a ghost version of himself that is invincible and untargetable gets left behind after the ritual is completed.

Replicate:
1. Go into a T12 Overgrown Shrine Map with Ritual Altars spawned
2. (potentially, optional) complete 2 ritual altars outside of the boss room
3. Go into the boss room and fight Maligaro until he summons his clones
4. Click the Ritual Altar during the clone phase
5. Complete the Ritual during that phase
6. Maligaro's Ghost should be left behind, untargetable and unkillable, preventing you from getting map completion

Image of Ghost and Arena:
https://i.imgur.com/g1il6xf.jpg

Notes and extra info:
I also have the mod that allows for a 50% chance of additional content, instead of using scarabs and I do not have any ritual-specific atlas passives. The current highest version of this map that I had available was T12 and I am running a Cold Venom Gyre Dexterity Stacking build with Awakened Fork.

PC / Client Specs:
Running 3440x1440 on Vulkan with a 3080 Ti w/12gb VRAM and i9-9900k / 64GB DDR4 3400mhz.