Faced a problem. The miner just stops working. It does not hang and can be closed.
Same here.
Mining for 4 days and than in 7 AM just stop, when I came home about 6 PM just click to miner "h" or something, and miner start mining again

[2018-12-03 07:15:45] Pool at02.supportxmr.com share accepted. (GPU0) (a:12435 r:0) (36 ms)
[2018-12-03 07:16:06] Stats Uptime: 4 days, 07:15:55
[2018-12-03 18:55:49] Pool at02.supportxmr.com received new job. (job_id: fys23FOZGVBTDnniqeH7zmyUc6fW)
[2018-12-03 18:55:49] Pool at02.supportxmr.com set difficulty to 204697

SupportXMR pool show no hashing for that whole time.
So, I think we have new bug on 0.3.8
