Well as far as I'm aware I haven't really experienced dreaming in delta sleep aside from one time, and that one time even despite being in delta sleep, the dream itself was fairly vivid but lasted only about 30 seconds or so.

You may have experienced a normal dream, 110 minutes seems about right for a first entire sleep cycle, you may have just went through the initial sleep phases and then hit REM, the dream plays out, it ends and it totals for 110 minutes or so.

Also I recommend doing WILD in conjunction with WBTB, you'll reach a true dream state far faster than if you did it when going to bed (unless maybe it happened rather fast for you? But it's about 90 minutes of waiting time minimum before a REM cycle starts at the beginning of your sleep.)