I have a Yealink T46S that doesn't send a re-invite when putting someone on hold. It worked on the 66.84.0.125 firmware version, but not on the 66.85.0.5 version.
Please open a ticket with Yealink (https://ticket.yealink.com/) and provide them the diagnostics they are asking for, so they can look into it further and hopefully fix it soon.