If your emulator supports Entry Assist/DOC mode, have a look at it. It was always fund, with word-hops, wraps, deletes, etc. By no means all emulators support it. It used to be a hardware-dependent thing (correct model of terminal controller) but I guess if supported, it will be software now.
However, a workaround for your problem is to use Text Entry mode in the editor when you want to paste. Go down to where you want the paste to arrive and type TE in the line-number area and press Enter. Then paste into the blank area that opens up, and press enter. You may need to do some minor adjustments afterwards.