Need Help! Serial DAT freezing problem with Arduino

Need Help!!
Doing some installation I got a strange problem with Serial DAT.
I getting messages from Arduino + Rfid Shield. It seem to work in Serial Monitor from arduino software, but in Touchdesigner 088 it seems to “sleep” each 15 -20 minutes. After I restart Serial DAT ( putting Active flag off and on) it works again.
ANy Ideas how to solve it?

Do you have an example you could email us at support@derivative.ca?
Off hand, Im not sure what may be causing that, though we’ve seen some short pauses when large amounts of data are being transferred.
-Rob