feel free to house rule it if you wish, but they seem to read as though the save the current state of the item no matter what it is as they go in the gloves. If that current state includes magical effects then that should be saved just as being on fire is. There is nothing to indicate that the clock on spells should continue to run, but on the other hand it mentions that it stores things in stasis. So zero indicators that spells durations continue, one indication that they stopped until the item is brought back out of the gloves.
