Only 2 shards out of 4 are getting updated

[NexganGH]

I have two clusters, one updating shards from 0 to 1 and the other updating shards from 2 to 3. However, it seems only the latter is working. I am getting no errors. The Top.GG page only has 2 shards and the guild count of the shards 2 and 3.

This is how I update the stats:
await me.UpdateStatsAsync(FirstShard, TotalShardsInBot, guildCounts.ToArray());

First cluster:
FirstShard = 0
TotalShardsInBot = 4
guildCounts -> a list containing two numbers

Second cluster:
FirstShard = 2
TotalShardsInBot = 4
guildCounts -> a list containing two numbers

Can anyone help me? What am I doing wrong?
Thanks