On mine it does not but comparing my photo to yours it appears that my anchor projects quite a bit farther forward from my spin tack then does yours.
I think I pulled the anchor further up on the roller than you did, with yours being the more likely resting position (or further out using the anchor mate as jssailem suggested, so I think the roll bar would be more angled like yours. I highlighted in yellow the area on your pic that is resting on the roller in my pictures.
You are attaching your tack to the anchor roller but what is holding it in place. The tack on an A-symm has a really big load when reaching in a breeze. I have a 16 power wrench and there have been times when I could not trim down the tack. On my C30 tall rig, the anchor roller is a part of the bow sprit stem fitting so it is directly connected to the bob-stay so I have never been concerned about this load. Have you given any thoughts to adding a bob-stay or solid strut to your roller to hold it down? If you use a solid strut, it would also help to hold it up under anchor rode loads. Sorry, Engineers always look at that stuff.
Yeah, good catch!! I've only sea trialed this boat so limited experience with it so far and not much spinnaker experience either, but enough to run it in light winds. However, I have noticed the bow roller is out there without much support underneath for force either direction. I have seen some 3700's with a solid strut of maybe 1/4 to 1/3 the length of the roller underneath, so somebody thought about it, but I haven't looked in to it much yet. I do know that the roller is at an angle to the bow, and not sure if they changed that in newer models to make it simpler to add support or not. But yes, I am aware but don't know what, if anything, to do about it, especially with the angle.
I am also worried about it a bit, especially with the Mantus M1, that the combo of long roller, not supported, and large fluke area scoop style anchor out on the end of it, that the right wave or wake (those tugs!) might put enough leverage on it to bend it. Not a problem at anchor with a bridle. So that's one of my con's for the Mantus anchors in general...something like the Excel would be seem to be much less force on the roller if it were to be buried in a wave, not that I'm qualified to calculate that, but that's the way it appears to me.
I'd love your thoughts on it all though!