It appears that this is the same bug that another user encountered recently. It’s a problem that can occur if you have (Bezier) automation curves with steep gradients. I believe that the team has a fix for this, but the suggestion I made to another user to delete the automation and recreate it worked for this user.
If you are happy to attach or DM me a sample project that shows the crash then we can use that to verify the fix will be ok for your file too.
You can probably easily check if this is the cause by disabling read automation. And then only for the vocal part and then delete the automation for the place it crashes only.
If you can attach or send me a project then it may turn out to just be one or two automation regions, and I can tell you which one.
Alternatively you can also try ‘Binary Search’. Select a range of 50% of the timeline and Export Audio for this region (usually this will trigger the crash). If it’s ok then you know the problem isn’t in that half, so it must be in the other half. Select 50% of the other half and repeat the process. After a few steps you can often isolate the problem very quickly (assuming that there is only one automation event causing the problem).