I'm using an iPhone SE with all the updates to phone and app.  In Photo mode and M exposure, I can adjust the shutter speed keeping ISO at 100 and I see M.M change and the display brighten and dim...all as expected.   My photo was perfectly exposed with M.M at 0.0 and shutter speed at 1/1250th.  When I go to Sphere Pano, I can change the shutter speed but there is no change in M.M (it's gray lettering instead of the usual) and the display doesn't brighten or dim as shutter speed changes...it just stays at what looks like a good exposure.  When I take the Pano, the 26 photos are all way underexposed; even if I set 1/100th shutter speed (remember, I just prior had taken a normal photo at 1/1250 which gave a 0.0 M.M and perfectly exposed photo).  Any ideas???

I'm using an iPhone SE with all the updates to phone and app.  In Photo mode and M exposure, I can adjust the shutter speed keeping ISO at 100 and I see M.M change and the display brighten and dim...all as expected.   My photo was perfectly exposed with M.M at 0.0 and shutter speed at 1/1250th.  When I go to Sphere Pano, I can change the shutter speed but there is no change in M.M (it's gray lettering instead of the usual) and the display doesn't brighten or dim as shutter speed changes...it just stays at what looks like a good exposure.  When I take the Pano, the 26 photos are all way underexposed; even if I set 1/100th shutter speed (remember, I just prior had taken a normal photo at 1/1250 which gave a 0.0 M.M and perfectly exposed photo).  Any ideas???