Customer unable to change retention

A customer reported being unable to change the retention to 365 days, and also later to 100. It reflects the change in the UI, however, not in BQ.

At first I imagined this was due to the partition limit (4000), and a switch between HOUR to DAY partitions, but a fewer number of days should be fine in that case. It may be just a simple CRUD issue, or another BigQuery limitation.