IndexOutOfBoundsException for more than 3 executors

I have created a cluster with one coordinator node and 15 executor nodes.
It works fine with less than 3 executors, but with more then 3, I got an error IndexOutOfBoundsException: Index: 15, Size: 10 when running a sql.
I checked out all configuration but could not find anything about the max number of executors.

Current version is dremio-community-20.1.0-202202061055110045-36733c65.
Thank you in advance.

@don.lafranchi Would you be able to send us the profile? Maybe from the stack we can find something (22.0 KB)
Here it is. @balaji.ramaswamy