iMessage app drawer not working for memoji and #images, while on Downtime

My child’s iPhone (on a family share iCloud account) is recently having issues with the memoji and #images apps inside the iMessage app. These are no longer responsive (though the icons are present) while the phone is under Downtime. I have set iMessage and most other apps (including all Apple apps except FaceTime) to be “always available” during Downtime. However, these two apps continue to be non-responsive. If I go to a previous memoji previously sent in an iMessage thread, and long press, it does allow me to see the full set of memoji options. This problem is new, within the last couple of weeks; previously these app drawer apps worked while the phone was on Downtime. I recently installed iOS 13.5, and the device is an iPhone 8.

Any suggestions on the settings that need to be applied for these to work while the device is under Downtime?

Thanks!