Hi, I have 6 websites running on wp and all of them having technical issues after updating to wp 5.4.
And sites are using different themes from different developers.
I think it’s a really bad timing rolling a update right now.
Since it’s a major version, you had a choice of updating (unless your host forced it).
I always wait until the first minor release, after a major.
If there are actual bugs you can describe, you can write a ticket or see if one has already been written. https://core.trac.wordpress.org/
