cannot refresh materialized views when not on public schema

[balazsdukai]

In R:

attr(ibex_int_space, 'proj4string') <- CRS("+init=epsg:3395")
ltraj2pgtraj(conn_data, ltraj = ibex_int_space, schema = "ibex_traj_materialized_bursts",
             infolocs = TRUE)
rpostgisLT:::createShinyBurstsView(conn_data,"ibex_traj_materialized_bursts")
rpostgisLT:::createShinyStepsView(conn_data, "ibex_traj_materialized_bursts", "ibex_int_space")

Then in DB:

set search_path to ibex_traj_materialized_bursts;
refresh materialized view step_geometry_shiny_ibex_int_space;

Gives:

ERROR:  relation "spatial_ref_sys" does not exist
LINE 1: SELECT proj4text FROM spatial_ref_sys WHERE srid = 3395 LIMI...
                              ^
QUERY:  SELECT proj4text FROM spatial_ref_sys WHERE srid = 3395 LIMIT 1
********** Error **********

ERROR: relation "spatial_ref_sys" does not exist
SQL state: 42P01

It affects the database backup-restore procedure as the same error is thrown when restoring a traj schema. Although the materialized view is restored completely.