I suppose, I even saw a new species.
Would be #35 here.
But I couldn‘t even get a try on it, as it was just flying fast pass the reeds.
If I got my sight and numbers right, it must have been a hairy dragonfly (Brachytron pratense).
Would be fantastic if we had this rare one here. But I don‘t have much time throughout the next weeks to prove it.
Top view on the abdomen would make it easier. especially the first abdomen segment.
But I am very much with you and what ObsIdentify says that it is a immature male Enallagma cyathigerum (common blue/bluet)
Go here: https://www.libellen.tv/libelle_gemeine-becherjungfer_enallagma-cyathigerum.html (German)
scroll down to the point "Reifezeit" and compare it to the photo of Barbara Bargmann.
Look at the abdomen pattern. I would give it more than the 67% that ObsID tells me.
The Four-spotted Chaser season has just started. There was a very unusual one with a pale blue frons, which surprised me when I downloaded (R5ii + RF 200-800mm). (Last one was photobombed).
Interesting observation.
Couldn't find anything about that in my resources.
Could be a mutation or a state during maturation.
That are the only ideas that come to my mind.