Astropy IERS data access

Whilst running on master, everytime I run pesummary I get the following lines

Downloading http://maia.usno.navy.mil/ser7/finals2000A.all
|===========================================| 3.2M/3.2M (100.00%)         2s

which originates from where astropy is imported (see the docs). Typically, this should only happen once on the first import, then the file should be cached somewhere. Is there something in pesummary which is cleaning up that cached file and causing it to be downloaded everytime?

While it is only a minor thing (adding 2s to every run), it would be cleaner if it didn't happen.