Painter's fleece on gypsum plaster - Would you have any concerns about that?

Hello everyone. I have a small question, maybe one of you can help me. We are currently pretty much at the end of our construction period. On the ground floor, the walls were plastered with gypsum plaster (Q2). I have now sanded them and wanted to start priming (so that the paint fleece can be applied later), but a painter told me that it is better not to stick paint fleece on gypsum plaster. There is a high probability that the moisture in the walls will become so strong that we will soon have to expect mold. Is this really the case? Does anyone have experience with gypsum plaster and paint fleece? Many thanks in advance for the help.

There is a high probability that the moisture in the walls will become so strong that we will soon have to expect mold. Is this really the case? Does any of you have experience with gypsum plaster and painter's fleece? Many thanks in advance for the help.

Painter's fleece on gypsum plaster is normal after all...
By the way, ventilating can help to gradually get the house drier over time. But it has nothing to do with the fleece – it can also mold without it.

I even suspected that. Thanks for the quick reply :)