Cracks in the screed. Problematic?

Thank you for the detailed response. The house has underfloor heating, so it is a heated screed.

@ Onik900": Please scan the floor plan once, mark the room in which the entrance photos (with the marking strip in the middle of the room) were taken and the location of the aforementioned marking strip.

And if only experts are allowed and supposed to respond here, 9/10 of the users could be deleted. This is an online forum after all, if you only want experts you have to ask them directly (and probably pay them too). Or am I seeing this wrong?

And if only experts were allowed and supposed to respond here, 9/10 of the users could be deleted. This is an online forum after all; if you only want experts, you have to ask them directly (and probably pay them too). Or am I seeing this wrong?

Humorously, I could say:
Raise your hands and be thankful that in the department "screed/floor coverings/tiles/parquet" of this forum it is different.
Anyone who asks here wants a professional opinion. And they get it (in most cases) related to the original question and described situation.
And all that without payment...

The installation of edge strips clearly falls under the trade "screed work" and is mentioned in the various screed standards, which I prefer not to list. Furthermore, in my entire professional practice, I have never seen a tender where the placing of the screed with edge strips is left to another trade. No, the assumption is not correct!

I only know it this way: the heating engineer installs the edge strips. In the tack system, the edge strips are installed first – and in practice, that is always done by the heating engineer. Tender or not. Theory or not.
And it was the same here. Bet?

I see it differently as well. From the construction process perspective, the heating engineer comes first, does insulation, edge strips, Rolljet, underfloor heating.
The expansion joints, yes, those are done by the screed crew, but insulation strips on the wall – I have never seen that. From a process standpoint and impractical, as it is not sequential. Especially since insulation strips on the wall are a piece of cake in terms of effort, so it’s not even worth the trip to send someone else for that separately.

It was different for us. First, the screeding company prepared everything including the edge insulation strips. Then the heater installer came and laid the underfloor heating pipes. Then the screed was poured.

Where is the problem now?