Emoji not loading from DB correctly in the Editor after migration to new host

Emoji not loading from DB correctly in the Editor after migration to new host, but the same page works fine in view mode.

Steps to reproduce:
1. create text block with emoji
2. save post
3. refresh editor, now the block with emoji becomes broken, but the page is displayed with correct emoji in read mode by public link

Here is the video: https://take.ms/Y9H8S

Everything works on my old host, but doesn’t work on the host I have migrated WP to. What could be the reason and how to fix?

In the DB I use utf8mb4 (utf8mb4_unicode_ci).

Here is my system info

					
== Server Environment ==
	Operating System: Linux
	Software: nginx/1.12.2
	MySQL version: MariaDB Server v5.5.61-MariaDB-38.13
	PHP Version: 7.2.22
	PHP Max Input Vars: 1000
	PHP Max Post Size: 8M
	GD Installed: No
	ZIP Installed: Yes

== WordPress Environment ==
	Version: 5.2.3
	Site URL: https://helloclerk.io
	Home URL: https://helloclerk.io
	WP Multisite: No
	Max Upload Size: 2 MB
	Memory limit: 256M
	Permalink Structure: /%postname%/
	Language: en-GB
	Timezone: Europe/Kiev
	Debug Mode: Inactive

== Theme ==
	Name: Twenty Seventeen
	Version: 2.2
	Author: the WordPress team
	Child Theme: No

== Active Plugins ==
	404page - your smart custom 404 error page
		Version: 11.0.3
		Author: Peter Raschendorfer

	Duplicate Post
		Version: 3.2.3
		Author: Enrico Battocchi

	Elementor
		Version: 2.7.3
		Author: Elementor.com

	Elementor - Header, Footer & Blocks
		Version: 1.1.4
		Author: Brainstorm Force, Nikhil Chavan

	Premium Addons for Elementor
		Version: 3.7.5
		Author: Leap13

	Safe SVG
		Version: 1.9.4
		Author: Daryll Doyle

	WP Global Site Tag
		Version: 1.0.4
		Author: Digital Apps

	WP Google Analytics Events
		Version: 2.5.4
		Author: Yuval Oren

	WP Super Cache
		Version: 1.7.0
		Author: Automattic

The page I need help with: [log in to see the link]