We've seen this in previous builds, and it apparently is back in this one:
- Dell Venue 8 Pro 3845
- HP Pro 608 G1
- after upgrading - both report a "Trusted Platform Module 2.0" problem in Device Manager and consequently their system drives are no longer encrypted.
While Windows states that encryption is temporarily suspended and would resume after the next boot, this in fact does not happen.
(edit: changed title to correctly reference build)