I've been having exactly the same problem with Spider Oak - the only difference is that OP's workaround doesn't want to work with my system. So I emailed Spider Oak support and received - what a shock! - a reply within less than 24 hours from a real human being who seemed to be saying what he wanted and needed to, rather than just spouting the creed he'd had drummed into him. I'm impressed. Anyway, the upshot is this - his first suggestion is that the version we're using (if we're getting it from the repo) is out of date, and that we should download the latest one. This is the link - https://spideroak.com/install
Having taken to heart a long time ago the warning not to install anything from outside the repo's, I'm not going to do it, until I've asked somebody (like Old Polack) his/her opinion about the advisability of just that and got the OK. Or not.
I copy the rest of his advice here -
"If you are still having this reboot issue with the new version, then I
will need additional information. Please let me know the name of the
device that is having this problem and please send your log files.
(Linux)To create an archive, please use the following command: tar cjf
spideroak_logs.tar.bz2 ~/.SpiderOak/*.log. Please be sure to specify
which of your computers these files are from! Once we’ve received
these files, we can get to work analyzing the problem and finding the
best way to fix it."
I don't know enough to comment on his way of creating an archive - but I include it in case it's useful to those who know far more than I.
Any comments on all of this would be welcome. I hope it might lead to this really irritating fault being sorted.