Custom List Grouped Columns – Default Collapsed Not Working

I hope someone can help with the following:

I have created two separate custom lists. Both lists are grouped by individual columns, with the groupings set to be ‘collapsed’ by default.

The first list is grouped by a ‘Choice’ column. If I un-collapse a group in this list it displays the data within that group. When I refresh the page the group automatically returns to being collapsed (as per the default). This is exactly what I need to happen.

The second list is grouped by a ‘Date’ column. If I un-collapse a group in this list it also displays the data within that group. However, when I refresh the page the group remains un-collapased (ignoring the default setting). It even remains un-collapsed if I close and re-open the site. This is the opposite of what I need to happen.

I’m assuming the default setting being ignored is caused by the group being set on a date column? If anyone has a workaround for this it would be very much appreciated.

Thanks in advance.