Hmm, that's a really weird bug. I did my testing on a Macbook Pro and didn't encounter this issue once.
When you touch a spike it should immediately send you back to the last touched light.
I guess low fps is slowing down the mechanics even slower since you shouldn't lose more than 1 life at all.
Thanks for reporting it tho! A gameplay video of this bug would be helpful but anyways I'll have a deeper look into this bug since this could break the gameplay.