diff --git a/Source/Diagnostics/WarpXOpenPMD.cpp b/Source/Diagnostics/WarpXOpenPMD.cpp
index 71d96a47927..a139f1c180a 100644
--- a/Source/Diagnostics/WarpXOpenPMD.cpp
+++ b/Source/Diagnostics/WarpXOpenPMD.cpp
@@ -709,6 +709,7 @@ WarpXOpenPMDPlot::DumpToFile (ParticleContainer* pc,
     }
 
     if (is_last_flush_to_step) {
+        SetupPos(currSpecies, NewParticleVectorSize, isBTD); // workaround for issue 4604
         SetConstParticleRecordsEDPIC(currSpecies, NewParticleVectorSize, charge, mass);
     }