I'm having the same problem on a 2019 16" MacBook. When I click to add a node while in warp > Mesh, Affinity Designer 2 immediately crashes every single time. It doesn't matter whether I have the node tool enabled or not. I have not successfully been able to use themes tool a single time without crashing on the first click.
My computer:
Model Name: MacBook Pro
Model Identifier: MacBookPro16,1
MacOS Version: 13.2.1 (22D68)
Processor Name: 8-Core Intel Core i9
Processor Speed: 2.3 GHz
Number of Processors: 1
Total Number of Cores: 8
L2 Cache (per Core): 256 KB
L3 Cache: 16 MB
Hyper-Threading Technology: Enabled
Memory: 16 GB
System Firmware Version: 1916.80.2.0.0 (iBridge: 20.16.3045.0.0,0)
OS Loader Version: 564.40.4~66
Apple crash report attached as well as video of crash.
affinity designer 2 mesh tool crash .mp4
Affinity designer 2 mesh tool caused crash report.txt