Bug - The passive skill tree does not save changes, the character became unplayable.

I attempted to adjust the passive skill tree for the second weapon slot and demonform (infernalist PoE 2). After making changes and saving the result, upon transitioning to another location or restarting the game, the changes were saved incorrectly. Around 5-15 points were randomly allocated across various branches. Since then, the passive tree cannot be modified at the vendor; I only lose gold when trying to respec talents.

Skills and passive abilities that should function in normal mode and demonform no longer active, making the character unable to fight or function properly.

Restarting the game, switching servers, and attempting to respec the passive tree again only result in further gold loss when clicking "Apply Changes," but the changes themselves are not made. (All last 300k gold lost + inability to play the character).

I suspect this issue is related to demonform and how it is treated as a weapon.

Edited: Upon further testing, I discovered that the source of the bug is a code conflict between the second weapon set and the demonform. For some reason, the code treats the demon form as a second weapon set, even though in the talent tree it is positioned as a separate type of weapon set. It seems that a bug occurred when attempting to separate the branches for the second weapon set and the demon form. (My character is still broken...)

Edited 2: When the skill tree is divided into two weapon sets, you can choose two different paths but cannot take the same talent in separate weapon sets. However, you have three weapon sets (the third being Demon Form) and reach a point where the talents split - fork, you completely block the ability to progress with one of the weapon sets because there are only two paths but three weapon sets. Wouldn't this also be considered a bug?