Has anyone lost data due to Windows BitLocker?

I like the concept of encrypted drives -- I don't like when I don't really control the keys or encryption scheme. I've experience numerous Windows reboots that failed, usually after a "Windows Update," due to a BitLocker issue. Latest was "An unexpected error was encountered attempting to retrieve the BitLocker volume master key during restart." I have numerous copies of the recovery keys in case I need to enter them manually, but I still just don't trust it.