diff --git a/beacon_chain/nimbus_beacon_node.nim b/beacon_chain/nimbus_beacon_node.nim
index 52ba77b77..6f71e1307 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -1563,7 +1563,6 @@ proc reconstructAndSendDataColumns*(node: BeaconNode) {.async.} =
 proc onSlotEnd(node: BeaconNode, slot: Slot) {.async.} =
   # Things we do when slot processing has ended and we're about to wait for the
   # next slot
-  await node.reconstructAndSendDataColumns()
 
   # By waiting until close before slot end, ensure that preparation for next
   # slot does not interfere with propagation of messages and with VC duties.
@@ -1830,7 +1829,7 @@ proc onSlotStart(node: BeaconNode, wallTime: BeaconTime,
   node.consensusManager[].updateHead(wallSlot)
 
   await node.handleValidatorDuties(lastSlot, wallSlot)
-
+  await node.reconstructAndSendDataColumns()
   await onSlotEnd(node, wallSlot)
 
   # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/validator.md#registration-dissemination