Hi make-type,

Is the Time Condition set correctly to establish the roundtrip every second?
Less probable but perhaps an option for a problem, are you sending the particles back to the main Particle-Group Folder? If not, then that might be the problem.

Could you please share your file, please, just as a C4D file (no compression - it should be below 1MB, greater is not possible here).

You can also have a look at this file, which I have set up today
CV4_2026_drs_26_PArm_01.c4d

Let me know how it goes.

Cheers