occasional crashes, suddenly unopenable projects

So far I'm mostly interested in using Fusion within Resolve 15 beta which is what I've been trying to do. I'm creating new projects in resolve 15 beta (not trying to bring projects from previous version) and working in standard HD resolution (1920x1080) and I'm finding it to be usable (with some crashes, mostly not easily reproducible) and performance seems pretty good, but 3 times now I've ended up in the situation where a project I've been working on (and which has been performing well) will crash and then cannot be reopened - it will crash or hang on attempting to reopen the project. At this point I've only been working with 1920x1080 imported still graphics and created Fusion clips to act as motion graphics and animated titles... I'd love to keep going with it but obviously it's frustrating ending up having to start from scratch with a completely new project periodically. Here's some tech specs on the machine I'm currently using.

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

[Rohit Singhal]

Can you please post a link to the crash logs?

Capture logs - viewtopic.php?f=21&t=48885