Parents of new Scouts that recently crossed over from a Pack to a Troop can not Send Message to leaders in the Troop after some Admin actions (more on this later). When they click on Send Message, nothing happens. The parents who are also still connected to the Pack can still send messages to the Pack leaders. The new Scout parents were able to Send Message correctly to Troop leaders until the following actions were taken. Scouts had been transferred to the Troop before their Arrow of Light and Adventures had all been marked as completed, approved, and awarded. Those Scouts were moved back into the Pack temporarily so that their Advancement records could be updated. This was done by entering an end date for the Troop membership, removing the end date for the Pack membership, updating the advancements status while they were in back the Pack (which lasted about a week), and then reversing those membership changes to put them back in the Troop. Since doing that, Send Message no longer works for parents of those Scouts.
Send Message is working for other parents in the Troop. The system behavior describe has been confirmed by multiple parents, on different browsers and platforms. Screen refresh, clear cache, and reboot were attempted but did not change anything. Connection Manager was checked – connections and permissions appear to be correct.