having issues with PG12 debian packaging repository

Hello hackers

I am getting sporadic errors when I tried to use PG12 bionic debian repository.

Here is the error message that is result of apt-get update.

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Failed to fetch http://apt.postgresql.org/pub/repos/apt/dists/bionic-pgdg/main/binary-i386/Packages.gz File has unexpected size (260865 != 260866). Mirror sync in progress? [IP: 34.96.81.152 80]
Hashes of expected file:
 - Filesize:260866 [weak]
 - SHA256:433bef097d8a54a9899350c182d0074c1a13f62c8e7e9987cc6c63cd11242abc
 - SHA1:1be55e080a1dd277929f095690ae9b9cf01e971f [weak]
 - MD5Sum:08189bf54aa297f53b9656bc3c529c62 [weak]
 Release file created at: Mon, 02 Sep 2019 10:25:33 +0000
 Failed to fetch http://apt.postgresql.org/pub/repos/apt/dists/bionic-pgdg/main/binary-amd64/Packages.gz
 Some index files failed to download. They have been ignored, or old ones used instead.

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It usually succeeds when I run it again.  Is there a way to avoid this? 

Thanks

Murat