Onion services csv data only show v2 traffic

When I download the csv file from Onion Services, I only see v2_traffic data.

Steps to reproduce:

1. Visit https://metrics.torproject.org/hidserv-rend-relayed-cells.html
2. Click on "Download data as CSV" - https://metrics.torproject.org/hidserv-rend-relayed-cells.csv?start=2022-03-11&end=2022-06-09
3. The csv file only contain v2_traffic:

#
# The Tor Project
#
# URL: https://metrics.torproject.org/hidserv-rend-relayed-cells.csv?start=2022-03-11&end=2022-06-09
#
date,variable,relayed,frac
2022-03-11,v2_traffic,0.321106290583704,0.962621
2022-03-12,v2_traffic,0.30414449810963,0.959077
2022-03-13,v2_traffic,0.305341752888889,0.973943
2022-03-14,v2_traffic,0.294825431798519,0.975088
2022-03-15,v2_traffic,0.273104013321481,0.975214
2022-03-16,v2_traffic,0.273091536877037,0.962452