Lightroom Squashing Portrait Images in Develop Module

[#1]

Can't find an answer for this issue that actually works even though theres been a few posts about it in the past. 

Suddenly, Lightroom is squashing my portrait images even though they appear as normal in Library leaving them un-editable. I've tried re importing and still have the same issue. This began two days ago and previously I've not had this issue on the exact same images. 

Can anyone help?

[#2]

Can't find an answer for this issue that actually works even though theres been a few posts about it in the past. 

Suddenly, Lightroom is squashing my portrait images even though they appear as normal in Library leaving them un-editable. I've tried re importing and still have the same issue. This began two days ago and previously I've not had this issue on the exact same images. 

Can anyone help?

[#3]

Welcome to the forum, this is a user to user forum so the responses that you receive will normally be from other users like yourself. Please provide additional info, see the screen capture. In this instance, a screen capture comparing what you see in the Library module vs the Develop module would be helpful.