When my Runner laid a soft shell it was up in the afternoon too. But she was acting off all the morning when I went to check on her she had just laid the egg. Of course it makes you worry. I started her on calcium citrate. I gave it too her for about a week. As far as I know she hasn’t ever laid another. They are on half acre so any of them could lay a soft shell and I’d never see it. Runners are such heavy layers and so tiny any way I can see how they would get depleted of calcium reserves.