Issue comparing data from East and West for CMIP6

[teunoknmi]

When testing with climate4impact I ran into some things I did not expect when comparing east an west.

When querying CMIP6 data on east-discovery I get no data back:

curl 'https://api.stac.esgf.ceda.ac.uk/search' \
  -H 'accept: */*' \
  -H 'content-type: application/json' \
  --data-raw '{"collections":["CMIP6"],"limit":200,"sortBy":["created"],"filter":{"op":"and","args":[{"op":"=","args":[{"property":"cmip6:variable_id"},"tas"]}]}}'

When querying CMIP6 data on west-discovery I get data back:

curl 'https://data-challenge-06-discovery.api.stac.esgf-west.org/search' \
  -H 'accept: */*' \
  -H 'content-type: application/json' \
  --data-raw '{"collections":["CMIP6"],"limit":200,"sortBy":["created"],"filter":{"op":"and","args":[{"op":"=","args":[{"property":"cmip6:variable_id"},"tas"]}]}}'

Shouldn't this query give data back on both east and west?

Furthermore the /aggregate endpoint returns different amounts for east and west.

west:

east:

When the variables are on both sides the counts are the same so that is nice. Is this a known issue?