When creating an unchained monk with the the latest stable (and the latest nightly autobuild, October 17th about 22:00 GMT) I get a d10 hit die for first level when I select unchained monk from the talents/class features tab. When I add a second monk level I only get a d8 hit die.
I have the following sources loaded:
Core Rulebook, Advanced Players Guide, Bestiary (1, 2, 3) Inner Sea World Guide, Pathfinder Unchained, Rise of the Runelords (Adventure Path and Players Guide), Ultimate Combat, Ultimate Magic.
This keeps popping up, but every time I test with the latest version, it comes back correct.
Unable to replicate
Just tested this behaviour with v6.07.01. The bug still exists.
Currently you can get up to 10HP when leveling up, but when you go back with "Edit" It shows a d8 as hit die.
UI reflects Class HD, and not the revised HD. It also incorrectly limits manual editing later, only allowing the values of the base Class HD.