Delete in Flatview

Greetings Gurus, Delete in Flatview is not working in Directory Opus 12.17.
I installed 12.17 today and I was repeatedly pressing my delete button (or the delete key on the keyboard) nothing happening.

It seems to work intermittently. I had 39 jpegs selected it failed. 3 HTM files worked.

It works fine here. Please give more details or screenshots.

This anomaly happened once, can't reproduce yet.