Dear Sir,
It's hard to tell that what's the root cause of the problem you've got. There isn't too much difference in bitlocker part between BIOS and UEFI during a task sequence operating system deployment. I would suggest that you can give us some more information:
what's the error message, what boot image (ADK) you are using, etc.
See tasks sequence in below link to see if it helps:
https://social.technet.microsoft.com/Forums/en-US/07c809fc-486b-49aa-8df8-70e374d90402/sccm-2012-r2-sp1-preprovision-bitlocker-windows-7-cannot-read-drive-after-reboot?forum=configmanagerosd
https://www.windows-noob.com/forums/topic/11766-how-can-i-reinstall-bitlockered-uefi-computers-using-network-boot-and-system-center-2012-r2-configuration-manager/
Best regards
Frank
Please remember to mark the replies as answers if they help and
unmark them if they provide no help.
If you have feedback for TechNet Subscriber Support, contact
tnmff@microsoft.com.