While my data shows that all pools besides Foundry mined on AntPool's block, ViaBTC found a block on Foundry's block.

Also, we see forks now almost every other day now..

My data might not show the full picture here as it shows ViaBTC only mining on AntPool's block. This is possibly due to ViaBTC running multiple stratum servers (e.g. "VIP" servers for high-hashrate miners) distributing different jobs.