As noted in the comments, I was getting extraneous RX messages in the buffer during TX that was causing the plugin to report RPM incorrectly and generally have issues controlling the VFD. Flushing the buffer immediately after TX was complete appeared to resolve this and the VFD control is quite a bit more reliable now.
As noted in the comments, I was getting extraneous RX messages in the buffer during TX that was causing the plugin to report RPM incorrectly and generally have issues controlling the VFD. Flushing the buffer immediately after TX was complete appeared to resolve this and the VFD control is quite a bit more reliable now.