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Changes between Initial Version and Version 1 of Ticket #13753, comment 4

initial	v1
1	1	Data is stored in the system clipboard on Chrome so this seems to be enough: https://github.com/cksource/ckeditor-dev/commit/fef11a8faace9b5b69ac9e6d1f41135a4c6c2b04 The problem is because the paste is recognized as external and `semantic-content` filter is applied, as @Reinmar said.
2	2
3		The solution does not work on Firefox, where we can not set custom data types, but also an issue does not occur there, because there is no paste filter. And we can do nothing on IE where we can set only text data.
	3	The solution does not work on Firefox, where we can not set custom data types (like `cke/id`), but also an issue does not occur there, because there is no paste filter. And we can do nothing on IE where we can set only text data.
4	4
5	5	Saving ID as `<meta>` data could fix the issue not Firefox, but it may be not that easy as we expect, because browsers like to modify data we put as the `text/html`. It may need a research and may be a reason of future issues, so I think the change should be minimal.