Hey ViRu3s!
Thank you for contacting us.
The Dev team has been made aware of this issue and they are currently investigating it.
Once additional information becomes available, it will be posted in forums.
Some players have had success working around this by replaying Sequence 9 Part 2. At the end of this part, the bow appeared again when back in free roam.
We apologise for any inconvenience and thank you for your patience and understanding while we work to resolve this issue.