in the agenda view it is not possible to collapse individually and recursively

in both web and desktop versions, In the agenda view it is not possible for me to collapse items, neither individually nor recursively. Only “collapse all” works (attached screenshot)

[2021/11/21] I just checked and realised that this error does not occur with new nested items, but only with nested items created before the date I posted this message.

[2021/11/22] And the nested items created yesterday that worked yesterday no longer work today.