I'm having an issue when exporting a (not very complex -- less than 20 layers, I think) 600 dpi 33x50 inch Designer project (created entirely in this version of Affinity Designer) as a 16-bit tiff and it crashes if I don't hit the export button fast enough. It crashes right when the "calculating size" message gets to 100%. The tiff seems to get created okay if I hit export before Designer finishes calculating the size. Creating a similar project with the same dimensions and dpi, with one blank layer doesn't seem to cause a crash. I accidentally selected the HDR file type during export at one point, and this same project also crashed the app with that file type as well -- right as it finished calculating the size.
Latest version of Designer 2.3.1
Hardware acceleration setting doesn't change the outcome.
macOS 14.2.1 M1 Max 64GB RAM >3TB free drive space.