@adsandie did you mistakenly install the 32-bit version of apm-server 7.12.1? It looks like there's a bug that would affect the 32-bit version only, but that wasn't introduced in 7.12.1. So I'm just guessing that you were running 64-bit 7.11.2 and 7.12.0, and 32-bit 7.12.1.
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