stream stops

After updating to 17, any stream I play stops after about 20 minutes and I have to restart stream–it usually starts where it stopped but it is irritating. I thought it might be a problem with buffering so I increased my cache size to 1/3 of my RAM (I have an Android box–MEMOBOX MX MAX Android 5.1 Smart TV BOX 2GB RAM and 16GB ROM). Didn’t help. Anybody else having this problem?