calling hugo with some command line switches may lead to a direction:
i would remove the complete public directory, run hugo --logLevel debug --printPathWarnings --printUnusedTemplates check the result and post it.
Guessing around what your config, frontmatter, layouts, theme looks like won’t help much, so have a look at Requesting Help - Let us see your code and follow.
maybe you upgraded hugo from a pre 0.146 but did not adjust your stuff… in that case you could try a build with 0.145.0
especially the second footnote on type