On the assumption that this might be a firmware issue, and noting that my firmware was a little out of date (4.7-Purism-4), I followed the instructions here to update (to 4.8.1-Purism-2). Sadly that didn’t fix it.
On the assumption that this might be a firmware issue, and noting that my firmware was a little out of date (4.7-Purism-4), I followed the instructions here to update (to 4.8.1-Purism-2). Sadly that didn’t fix it.