We just signed up to zoom yesterday, and having the exact same problem. Need this feature for a meeting on Tuesday and can’t get through to support. Very frustrating.
When the chat options are set to “Participant can chat with everyone”, the host sees all messages fine. When the option is set to “Participant can chat with host only”, any chat sent by attendee does not get seen by the host or anyone else.
Using the desktop client Version: 4.6.7 (18176.0301) on windows 10.