'grafana loki operator logs all come prepended with 'stderr f'

Picture below, why is it stderr f appears here? My logs are all in json format as expected. This is very annoying

kubernetes grafana loki

Solution 1:^[1]

Those are cri-o containerd log format. With the k8s upgrade you probably switched to containerd too and is affecting log format.

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	Jorge