"Show Guides" in Fusion Viewer doesn't work

right clicking in Fusion viewer and choosing Guides / Show Guides (or cmd-G shortcut) fails to display any guides (like center point or safe title etc.)

System Version: macOS 10.13.4 (17E199)

Model Name: MacBook Pro
Model Identifier: MacBookPro11,5
Processor Name: Intel Core i7
Processor Speed: 2.5 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 16 GB

GRAPHICS
AMD Radeon R9 M370X:

Chipset Model: AMD Radeon R9 M370X
Type: GPU
Bus: PCIe
PCIe Lane Width: x8
VRAM (Dynamic, Max): 2048 MB
Vendor: AMD (0x1002)
Device ID: 0x6821
Revision ID: 0x0083
ROM Revision: 113-C5670E-945
VBIOS Version: 113-C567A1-006
EFI Driver Version: 01.00.945
Automatic Graphics Switching: Supported
gMux Version: 4.0.20 [3.2.8]
Metal: Supported, feature set macOS GPUFamily1 v3

right clicking in Fusion viewer and choosing Guides / Show Guides (or cmd-G shortcut) fails to display any guides (like center point or safe title etc.)

Confirmed this is now fixed in beta 5