I sometimes get booted from pool with latest linux version of JCE cpu miner. Am mining Turtlecoin to Steadyhash pool.

miner: jce_cn_cpu_miner.linux.033q.zip
os: ubuntu 16.04 & 18.04
log:
07:58:04 | Rejected by the pool in 54 ms.
07:58:04 | Connection failed: The pool kicked you out as Unauthenticated, its Difficulty 600023 is probably too high for your computing power. If the pool allows fixed Difficulty, fix it to a lower value.
07:58:04 | Connection interrupted, waiting 5s then retry, attempt #1
07:58:04 | Connection failed: Socket receive error: socket explicitly closed by the pool
07:58:04 | Connection interrupted, waiting 5s then retry, attempt #2
07:58:09 | Connecting to mining pool trtl.steadyhash.org:3853 ...
07:58:10 | Connecting to mining pool trtl.steadyhash.org:3853 ...
07:58:10 | Connected to pool. Now logging in...

Had 3 different ubuntu machines mining to same pool. When I woke up I saw it was at the ubuntu command line on all 3 machines instead of actually logging in.

Note that I got some windows machines on xmrig that don't seem to experience this issue.
Unsure if pool or jce is the cause.