I don't get it enough to bring an extra step into the equation. Are you sure you're not letting more air in as well? The adjust-a-bowl already let's some air in due to the design.
I just did some testing and sticking seems to be mostly due to the weight of the head pushing down on the bowl. My NV glass bowl also sticks more than the adjust-a-bowl, which doesn't stick at all. But the spacing trick won't work with the glass bowl. This is also just for my setup/pieces.
If I hold the heater head on the glass bowl for 3 minutes while not letting the weight rest on the bowl, it doesn't stick at all. The bowl is HOT at this point.
Same test but letting the head rest on the bowl as normal, it will stick instantly sometimes while still cold. This to me says it's mostly a matter of the weight pushing the male stem down into the hole real good. I can also get it to stick pretty dang well just by putting some pressure on the bowl with my hand.
If I leave the heater on the adjust-a-bowl long enough that it gets fully heat soaked, it will usually stick. Not sure why anyone would ever do that, though.
When something gets stuck due to heat, it usually gets really stuck and essentially has to cool down to be removed. From my understanding, this was what happened with the OG bowl and I could see it happening if you left the heater on the bowl like some people do. Doesn't seem to be what is happening on my end.
I think the fact the glass bowl sticks more is just due to sandblasted on sandblasted contact in my setup. The adjust-a-bowl doesn't really stick, but I also doesn't leave the heater on the bowl. I don't think anyone should do that. The two-piece design allows you to take a few rips before the bottom portion that connects to your rig gets hot enough to expand to a point of sticking, then remove it to the stand until the next use. I am actually very surprised to see that some people leave their heater on the bowl. Do you guys not own a stand?
If you leave the heater on the bowl too long, you are basically replicating the one piece issue. Two-piece just slows down the transfer to the bottom male/female connector.