@avdajay Try to UNCOMPRESS your pages. Not sure how you do that, but try to disable it.
@dimalifragis thank you for the reply. But unfortunately this issue has been even on our local development environment even without installing cache and other optimization plugin.
@avdajay Ok, then you could enable standard WordPress debug to a LOG and check in there for any errors?
Unfortunately, we have found other issues as well. Looks like an incompatibility. We’re still tracing it, but thank you for your reply. 🙂