[anti-censorship-team] Default bridges down?

Hi, The Briar team's nightly tests of our bridge config have shown that some of the default obfs4 bridges listed in the Tor expert bundle's pt_config.json have been down for some time: 192.95.36.142:443 193.11.166.194:27015 193.11.166.194:27020 193.11.166.194:27025 209.148.46.65:443 45.145.95.6:27015 Of these, 193.11.166.194 immediately rejects connection attempts on the listed ports, while connection attempts to 192.95.36.142:443 time out. The other two accept TCP connections but are very slow, so Tor can't bootstrap through them in a reasonable amount of time. Is this a known issue, and is it expected to be temporary, or should we exclude these bridges from our config? Thanks, Michael