Monday Timelines / Dependencies do not respect duration

I have a project plan with durations for items. Timeline is connected to duration.

For whatever reason, when I go to select a starting date for an item, it does not respect duration. Usually when I go to timeline and select a date, it will highlight the following dates to complete the date range based on the duration it’s connected to.

e.g. Choosing March 1 would automatically highlight to March 7 with a seven day duration.

Instead, it just takes that day, and then changes the duration. Additionally, none of the dependencies that are connected to that item update based on the selection. I have other similar boards where everything updates just fine, and duration is respected.

I’ve tried disconnecting and then re-connecting duration, refreshing the page, etc. Nothing has worked so far. Am I missing something obvious?