AMS not Filament detection anymore

My HT is nearly one month old and it can’t detects Bambu Filament anymore. I tried today 3 different spools with the same result. The rest is working fine with the HT.

Is this a known problem? Some ideas for fixing?

Have to ask a very stupid question but did you reboot the printer and AMS (HT)? Because mine occasionally gets confused and does this, and a restart cures it.