Hmm, strange. Some ideas which I cannot prove but maybe you know more about:
1. When installing system files runtime priority changes due to other system files installed in the meantime, like in a queue and newly installed files get to the end of it.
2. How is RSAP loaded, i.e. do you use e.g. the "intent-mechanism" of Android? Or is it if a memory hungry app forces Android to kill the RSAP app it is dead until it is manually restarted?
3. SMS-plugin was installed, too, maybe it introduced some delays or similar messing with the connection establishment?
TIA for your help.