There's yes an issue with IFTTT, but with the applet I have created:
If for instance, I use one of the already created applets using tado (like this https://ifttt.com/applets/336096p) they work, and I do not really understand, I'm not doing anything weird and the pre created one is also using my tado account to connect to my devices.
Do you plan to support tado at any point in time? this way I could get rid of IFTTT.
Thanks for your help,