One hex move into mountain hex >1000m

[RocketMan]

In the online documentation for version 1.0.10 in section 4.2.3 Move One Hex it states that that:

4.2.3.2 This move type allows a player to move the unit one hex in any directions with the following constraints.
c. Hex cannot be a mountain hex >1000m

However, as can be seen by the screenshot below, WWIIE allows a One Hex Move into a mountain hex >1000m (the hex northeast of the unit is shown in the Command Panel detail).

I don't know if this is an error in the documentation or the code.