"Essenzaufopferung" at 45/45 still shows radius 4 – am I missing something?

Quick question: I've leveled the glyph Essenzaufopferung (Essence of Sacrifice) to 45/45, but when I check the Paragon board, it still shows a radius of 4 tiles around the socket. I thought maybe it would expand further at max level, but I'm not entirely sure if that's how it works or if I'm missing something. I've tried reinserting the glyph, switching characters, resetting the Paragon board, and restarting the game - but the radius display stays the same. It's totally possible that I misunderstood how the scaling works or that something changed and I didn't notice. Just wondering if anyone else has the same experience with this glyph, or if I might be overlooking something obvious. Thanks