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Yes, this looks like a broken monitor profile - but it can also be a GPU bug. Those are two sides to the same coin nowadays, since the conversion into the monitor profile is executed in the GPU now. One marginal component can throw the other off.

To test, first try to disable the GPU in preferences. Next, replace the monitor profile with a known good standard profile - sRGB, Adobe RGB or Image P3 depending on the type of monitor you're using.

Note that this is just for diagnostic purposes, to determine where the problem is, it is not a fix.

The real fix is either to use a calibrator to make a new monitor profile (which you should do in any case), or fix the GPU bug with a healthy driver, whichever applies - or both.

It could also be an old and underpowered GPU, but we don't know what you have.

My first thought is that your monitor is not properly calibrated. You should calibrate it.

{moved from Lightroom to Lightroom Classic forum}

[Moderator moved topic from Using the Community Forums to Lightroom.]