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The lines from the two IWEs at the wheels go to a single "tee" and then a single line to the IWE solinoid. A vacume leak between the IWEs and the Solinoid will lower the vacume over the whole area meaning that a loss of vacumme due to a hose off at one IWE affacts vacume at the other IWE.
Your IWE on that wheel has been engaged for sure but not the transfer case so likey no harm. Likely that the vacume leak also caused the other side to not have sufficient vacume to release in which case, both IWEs were engaged and as long as the transfer case was in 2WD, the front driveshaft turned at it's own speed as driven by the front wheels.
The vacume lines from both front wheels join at a "tee" that is connected to the IWE solinoid by a single vac line. Open up a cut / crack / slipped hose anywhere between the IWEs and IWE solinoid and you cause a drop in vacume over all. Between the IWE solinoid and the engine (vac source
) there's twop check valves and another "tee" and a vacume storage canister .... but that's all above the solinoid which is just an electrically operated valve.
To test if this is maybe happening, start the truck up (need vacume being created as even a perfect system will engage the hubs after being parked a while with engine off and we know we have a big vac leak here on yours
) , use a floor jack and jack the other front wheel up so you can turn it, and give it a spin by hand. If it spins freely and the axle doesn't, the IWE released. If the axle spins with the wheel, it didn't release. Try both front wheels, but this one with the hose loose surely did not release.
My guess is the other one didn't release either.
I hope no moisture got in there, you may be replacing IWE too.