Automatic restarts limited

I’m trying to add Windows build to an open source project and I keep seeing this message for any windows CI runs after it trying to boot the machine for a while:

Automatic restarts limited: Please try restarting this job later or contact support@travis-ci.com.

https://travis-ci.org/github/unisonweb/unison/jobs/697808478
https://travis-ci.org/github/unisonweb/unison/jobs/698966215

Any idea what could be the reason?

Please see the documentation about the auto-cancel feature below;

I don’t understand, how is this related to my question?

I think the Windows machine keeps trying to boot for a long time (while it’s being the most recent commit), like it keeps trying for more than an hour or so then it just fails with the error that I posted. I don’t think the auto-cancel feature is in play here. Can you clarify what you mean?

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