No it is unlikely to be an issue.

I don't believe in blanket statements, there are pros and cons to everything saying this is bad or that is is fine, that is opinion. The fact is nothing anywhere is with out some risk. I don't believe the risk involved with kraft paper is high nor do I believe the risk of Aspen is high, or any other commonly used substrates. Some have more issues than others like pine. I have decided for my self that kiln dried pine offers a relatedly low risk but raw pine is quite high. To my mind there would always be a question of is this kiln dried or not and that question makes it an unacceptable risk. I believe there are issues with Aspen but they do not pose significant risks, the same can be said for papers and coconut products. None have significant risks, it is opinion of how much and how serious that risk is.

If there were serious risk no one would suggest using it like cedar I have never seen anyone suggest it for keeping snakes on. There is significant risks with it the rest have much debate the fact there is debate suggests the risks are not massive ones. Other wise it would be clear and there would be many many problems associated with it.