Why can't tstats search sourcetype field specifically?

[hketer]

Hi All,

I'm running the query 

| tstats count where index=<index name> by sourcetype

No results  
OR 

| tstats values(sourcetype) where index=<index name> by index

and the results for values(sourcetype) is null\empty.

I have up to date data with  no delays in indextime .

I've checked the fields.conf on indexers and I do see the field [sourcetype]

**Also there are sourcetypes that does work and I see the field 

Any ideas how to check this? or what can be the issue?

Thanks,
Hen

[gjanders]

I tried:

| tstats values(sourcetype) where index=_internal by index

That works and | tstats count where index=_internal by sourcetype

Also works on 8.2.0

Did you have the time range set correctly to find data?