Thanks again for the feedback and reports. Version 1.0.2532 has been released, and it addresses the following bugs / tweaks:
Fixed various progression locks related to saving/loading in Chapter 8 and right before Chapter 9
Fixed a bug where New Inverness's BGM doesn't play under certain conditions
Fixed a bug where Susan can get stuck on the drone racing stool
Toolspells no longer cancel other abilities' cooldown, and each Toolspell now has its own cooldown
Switching characters no longer cancel Toolspell cooldown
Traveling to a new area no longer reduces MP to 1 chunk
Enemies will no longer attack the the previous character when Character Switching
"Steamdeck settings applied" menu now automatically hovers the "Continue" button
Ramiel enemy in Chapter 2 Part III no longer disappears if you die and respawn there
Fixed a bug where switching characters over the fountain in exodus can grant EXP
The preview health bar in the Inventory no longer shows up when an item only grants MP
Player is now invulnerable during Jen's Dual Swords dialogue in Chapter 9
Individual Invert Y option has been added for Drone Hover and Drone Flight Mode
Hollow's Attack02's red flare now telegraphs for a longer period of time
Chapter 1 Boss's armor has been increased from 600 to 1000
A soft checkpoint has been added to the end of the Chapter 1 Boss Fight, before the mob encounter
Chapter 5's Shooting Section no longer grants XP
Fixed a bug where clothes can desync when the characters are turning too quickly
Healing Halo no longer heals enemies under specific conditions
Fixed a bug where the Blood Cannon Charge Cancel sound was playing at 200% volume
This one should address almost all the major issues, but we will keep testing and fixing bugs as they come up, along with working on upcoming content. Thank you for your patience.