I had this issue on rc2 as well. On 6.7.2 previously and for all releases before that I used, I could access my shares on my phone on the same network. rc3 seems to block that access. I checked before upgrading to rc3 and was able to access my shares, I then updated and checked after the server was updated for 10 minutes. I could not access any shares on my android device. Then I went back to 6.7.2 and was able to access them again within a minute of booting, so its definitely related to 6.
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