I was able to replicate your issue by following your step by step actions.
Not 'good' behavior but a slight modification to your methods will likely result in joy.

Instead of using 'Delete', use 'Cut'.
I have never had an error when doing this.
Highlight what you want to remove.
Use Edit-Cut (instead of Delete)

*Make sure the selection in the resulting Pop Up is what you want; the Close Gap option gets rid of the space occupied by whatever you are cutting (closes it up), so it will cause the rest of the track to move to accommodate.

The Leave Gap option removes just the data and leaves the time span empty without affecting the rest of the track.

Know that when doing this the From-Thru settings can be used to refine your settings.

I do not work here, but the benefits are still awesome
Make your sound your own!