It also happens that C4D crashes when I hit render in VFB.
I uploaded a bug report. Hope you can find something :)
Successfully uploaded as 1637347923_AlembicParticlesIssueBugReport.zip.
Happy weekend!
Edit: I tested a bit around, and I have a scene now which crashes every single time when I hit render.
Successfully uploaded as 1637352645_AlembicParticlesCrash.zip.
Thank you for checking!