Hello, would you be able to send over your page content so we can try it out? We want to see the scenario for the slowdown. Please click on the 3-dots button on the upper right of the post editor, then click on “Copy all content”, then please upload it to PasteBin, then email the link to us at [email protected] .
Based on experience, it’s possible that when the page is really long, especially if you use a lot of columns and nested blocks, it can be slow even with just the native blocks. Lessening the amount of levels of nested columns can drastically improve the editor performance. Two easy ways you can reduce the need to nest multiple columns inside each other is by utilizing the block’s background setting (under the block tab in the inspcector), or a column block’s container setting (under the style tab).
Also, are you using a lot of Stackable columns in the page? Because if you do and then you disable Stackable, that might make it look like it improves the editor performance, but probably because it also stopped the nesting of a lot of blocks because the columns have also been disabled.