Some LG and Motorola users reported issues with recording long audio messages. We changed the default recording setting only for affected devices. These devices will now see "Talk" in place of "Hold and Talk." The "Talk" button works by allowing you to tap once on the button to start recording your audio message and tapping the "End" button once you are finished speaking.
If you don't like the new setting you can switch back to "Hold to Talk" from any chat, but your audio messages may have short limits.