composeExtension with type "message" will not return text to compose message area with Messaging Ext

[Jason1395]

composeExtension with type "message" will not return text to compose message area with Messaging Extensions

I meet the same issue as "composeExtension with type "message" will not return text to compose message area with Messaging Ext..." . Could anyone please give some suggestions.

[#2]

Thank you for reporting this, we will check this and get back to you.

[#3]

We are able to repro this issue, this seems to be by design. We will check internally and get back to you.