I posted something similar about glues and tapes a while back, You can use a glue and a tape for a while without any problems then just out of the blue yiu get a reaction and there is no 100% logical explaination, One theory I came up with is is that it can occur when there is a change in the temprature ,I know for me in the summer months and when sweating I can get a little bit of a rash from some glues and tapes that when not sweating I dont get.