CKEditor - Can't undo incorrect word with single undo step.

[jswiderski]

1. Open SCAYT sample at https://www.webspellchecker.net/samples/scayt-ckeditor-plugin.html
2. Disable spell checker first
3. Keep cursor at end of a correct word and press I (italic) button or use CTRL+I to apply italic style
4. Write some characters to make the word invalid.
5. Turn on the spell checker
6. Now press undo button or use Ctrl+Z to undo the writing of text.

After step 6, undoing once has no effect. It works if undo button or Ctrl+Z is pressed 2 times fast.

Please see attached video:
2017-09-08_1319.zip

NOTE: If SCAYT is not enabled by default, you need to enable it first, disable it and then perform further test case steps.

[jswiderski]

If after step 5, you disable SCAYT and then press undo, the first undo step brings back SCAYT spans in HTML and underlines words again.

[AAbakumov]

Dear @jswiderski
Thank you so much for heads-up.
We have reproduced the issue and created it on our side.
Have a wonderful day.

Regards,,
WebSpellChecker Team

[jshaptala]

Hi @jswiderski ,

We do plan to investigate the possible ways how to fix this issue in the near future. As soon as we have the results, we will be able to provide you with ETA for the fix.

Regards,