Won't load Windows 10 after enabling BitLocker.

The reason I had to switch from Legacy to UEFI was because when the drive was cloned, it used GPT.

On Legacy mode, it didn't boot, once I changed to UEFI, it booted to Windows (till I turned on BitLocker)

I'm using Acronis True Image for cloning.  And it says "The selected disk will be converted to a GPT layout that makes this disk bootable"

Hi Tony, 

Thanks for reaching out to the Sophos Community Forum. 

If you enter the pin you defined, and press enter while the device is on the blank blue screen, does the system continue to boot to Windows? 

In the following Microsoft Forum, I found another user who reported a very similar issue. 
- Blank light blue screen on boot in Windows 10 after Bitlocker encyption

@Qoosh, yes that fixed the issue.  So its a Microsoft issue?

Any idea how I can show up the pin enter field so users know its waiting for a pin?

The computers that I'm having this issue is only happening on the ones that changed from Legacy to UEFI mode

This appears to be, yes. I'd suggest doing a full decrypt on the drive, followed by disk repair utilities. You can then try re-encrypting the drive to see if this returns any better results.

If you still have the original drive, it may be easier to use Microsoft's system image tools as these may play nicer when BitLocker is involved as well. 
- Back up and restore your PC