[BUG] temperature setpoint not communicated to Faikout

[lost101]

Faikin hardware
Purchased multiple boards from Faikin Australia including communication cable A type. 2 boards are installed in S21 systems and one CN_Wired.
All is connected to Home Assistant and communicating ok.
2 of the units that have the same issue are using S21 protocol however I can control from Home Assistant and webserver and communicating ok.

Daikin hardware
FTXC18AXVJU

Describe the bug
First issue: Unit is turned on by remote and temperature is raised or lowered, the Faikout does not see the new temperature setpoint. The temperature can be commanded from Home Assistant and Faikout without issues.

Second issue: Unit set by remote to Auto mode, shows up as FAN in Faikout. When commanded Fan on Faikout, the unit goes into actual fan mode.

Expected behavior
Temperature should resound the same when changed by remote or by Faikout.
Auto mode should be shown in Faikout when remote sets it in auto.

Additional context
2 other units set with CN_Wired behave as expected and work very well.
Attempted multiple different settings, restarting the unit, verify cables.
I have tried stable FW and Beta but both behave the same. I am out of ideas and looking for help to figure out if I missing something.

[revk]

Are you using the Faikout auto feature?

[lost101]

Yes, I do. However, In auto the unit does not switch between cooling and heating. I ended up enabling lock mode for Faikout to keep the unit working.

I spent more time today to understand the issue better, as the hint of Faikout auto gave me a new clue.

When the unit is turned ON and set to AUTO mode by remote control, the temperature does not update in Faikout because it thinks that Fan Mode is on. Once the unit is switched to heat or cool (remote control or Faikout) the temperature syncs as expected. It seems that the command for AUTO mode is the same as FAN mode in Faikout. Of course I could be wrong and there is a different explanation for this.
revk what can I do to take this troubleshooting to the next level?

[revk]

Faikout auto sets the real target temp in the a/c high and low to control against reference temp, so cannot accept temp controls from the a/c from the remote.

If you are not using Faikout auto mode, all modes and temps should reflect from remote to the Faikout, though "night" mode has been traditionally slightly problematic, even that should work now too.

Fan and auto are different. There is a dump and debug setting that logs things to MQTT.