Deleting the jre-win dir if it exists before launching a client would help if there is a prior failure. The JRE is only dowloaded once per version so after it succeeds there should be no issue from there on out so simply launching a client or designer on a machine should allow you to get a cached runtime (assuming you don’t hit this issue, which the previously mentioned workaround should fix)
It should also be noted that a fix for this is currently submitted for testing and should make it into 8.1.1 and be included in that release (and subsequently, the nightly build in the coming days once it’s merged into the codebase)
Thanks,
Jonathan C