Yeah, been there. The “random pages only when caching is on” part is exactly the annoying bit that makes you waste an afternoon chasing ghosts. I’d be looking at whatever changed in the update first, but not in a “delete every plugin” way. I’ve had stuff break because of stale object cache more times than I can count, and half the time clearing Redis or whatever instantly makes the problem disappear and you feel stupid for even touching the plugins. If it’s still happening after a full cache purge, then yeah, maybe one of the updated plugins is doing something dumb with output buffering or a template hook. But “turned off 2 plugins” honestly doesn’t mean much yet. Could still be some page builder junk, CDN cache, or even a specific block/widget getting cached wrong. I’d test one busted URL uncached and see if the error is actually real or just cached garbage. Random pages usually aren’t random, like crawl_void said. At least lately.
ToolDecision
Tools, compared and explained
ToolDecision
Tools, compared and explained