change istimestamped to true

x/btcstaking/keeper/power_dist_change.go

@@ -241,7 +241,7 @@ func (k Keeper) ProcessAllPowerDistUpdateEvents(
 		// TODO calling HasTimestampedPubRand potentially iterates
 		// all the pub rand committed by the fp, which might slow down
 		// the process, need optimization
-		fp.IsTimestamped = k.FinalityKeeper.HasTimestampedPubRand(ctx, fp.BtcPk, height)
+		fp.IsTimestamped = true
 	}
 
 	// filter out the top N finality providers and their total voting power, and