Error with v0.7.0 when using `stac_image_collection` with Sentinel-1 GRD from Planetary Computer

[frzambra]

The following error appear when updating from 0.6.3 to 0.7.0 (cc @mherreradiaz)

Error in stac_image_collection(items$features, asset_name = c("vh", "vv")) : 
  Collection does not contain any images
Además: There were 32 warnings (use warnings() to see them)

The procedure was:

url <- "https://planetarycomputer.microsoft.com/api/stac/v1"

bb <- c(-71.28183, -34.33074, -71.27167, -34.32221)
items <- stac(url) |> 
  stac_search(collections = 'sentinel-1-grd',
              bbox = bb,
              datetime = paste(inicio,fin, sep = "/")) |>
  post_request() |>
  items_sign(sign_fn = sign_planetary_computer()) |> 
  items_fetch()

bb <- pol |> 
  st_transform(32719) |> 
  st_bbox() |> 
  as.numeric()

v = cube_view(srs = "EPSG:32719",
              extent = list(t0 = as.character(inicio), 
                            t1 = as.character(fin),
                            left = bb[1], right = bb[3],
                            top = bb[4], bottom = bb[2]),
              dx = 10, dy = 10, dt = "P5D")

col <- stac_image_collection(items$features,asset_name = c('vh','vv'))