Critical crash when attacking from Roah Companion (rollback + client crash)

Hello,

I would like to report a reproducible crash related to the Roah Companion mount.

Summary:
When attacking with a bow while mounted on the Roah Companion, the server rolls back my character position, followed by a short freeze (~1 second) and then a full client crash to desktop (no error message).

Details:

The crash happens consistently in all instances

It only occurs when:

Mounted on the Roah Companion

Attacking with ranged bow skills

Especially while moving

The issue is always preceded by a server rollback / desync

Attacking while dismounted does not cause crashes

Staying mounted but not attacking does not cause crashes

What I tested (no effect):

Changing graphics API (Vulkan / DX12)

Limiting FPS to 60

Windowed / fullscreen modes

Clearing cache and shaders

Changing instances and zones

Different gateways

Important note:
Other players can play similar builds without crashing, which suggests this may be a conditional server-client desync bug, possibly related to movement + projectile validation while mounted.

Temporary workaround:
Dismounting before attacking completely avoids the crash.

This feels like a server-side desync / rollback issue related to mounted combat with ranged attacks.

Please let me know if you need logs or additional testing from my side.

Thank you for your work and time.