Strong smell when turning down the underfloor heating

Hello, has the problem been solved by now or is it known what it was?

Exciting topic. I can't quite tell? Is that something like silicone/adhesive in the joint or is it just an illusion?

Hello,
we have the following problem. In our new build (moved in 6/22) a sweet / sour slightly biting smell similar to "stale sweat" has appeared for a few weeks. I wouldn’t describe it as chemical or musty. We have now observed that it comes from the bedroom and only affects the bedroom. We would localize it along the floor / towards the exterior wall. Now we turned the heating up fully once and waited to see what would happen. The smell disappeared. Now when we turned the heating down again, the smell reappeared. Sometimes you get a real "cloud" coming towards you. It basically rises upwards towards the windowsill. It now seems likely that the smell comes from the heating. Does anyone have an idea or has had a similar problem? We are grateful for any advice! We haven’t installed the baseboards yet. Ventilating makes it temporarily better. There are also no laundry baskets in the room or similar.
Floor: underfloor heating, screed, PE foil, cork parquet.
Many thanks in advance!!