I have a canon 650d, recently the camera is taking dark photos (low exposure) I always use good settings/standard, but somehow it started giving dark images even under the sun light !!!

in the picture below I was under a strong source of light with these settings : shutter 1/250, aperture f/4, iso 800

I used the same settings but with auto iso and the camera chose iso: 6400 and the image was nice but with a lot of noise of course. If i switch to program mode it will always use high iso (6400) or maybe really slow shutter speed like 1/20s even under the sun light.

Any ideas or help ?

I have a canon 650d, recently the camera is taking dark photos (low exposure) I always use good settings/standard, but somehow it started giving dark images

in the picture below I was under a strong source of light with these settings : shutter 1/250, aperture f/4, iso 800

I used the same settings but with auto iso and the camera chose iso: 6400 and the image was nice but with a lot of noise of course. If i switch to program mode it will always use high iso (6400) or maybe really slow shutter speed like 1/20s.

Any ideas or help ?

Edit : Apparently this problem occurs only when I shoot indoors under normal lightening, Taking pictures under the sunlight is good and has no problems in it.