Newline not always respected in form design

[lognaturel]

We recently made some fixes to newlines. I'm surprised to see that they're not respected in this form:

Parcel packing(2).xlsx

XForm snippet:

<label> Deliveries assigned: <output value=" /data/existing_packed_at "/>
Target weight: <output value=" /data/existing_target_weight "/>
Actual weight: <output value=" /data/existing_actual_weight "/> </label>