Jodit Version: 4.0.18

Browser: Chrome/IE/Safary/FF
OS: Windows/Mac/Linux
Is React App: True

Code:

1. in source mode paste this HTML

<p style="font-size: 16.5pt; margin: 0">Body Subtitle</p>
<p style="font-size: 10pt; line-height: normal; margin: 7px 0 0 0;">To modify this template, place it into your Outlook editor.</p>

2. change mode back
3. select Body Subtitle byt triple click
4. delete selection

Expected behavior:
paragraph <p style="font-size: 10pt; line-height: normal; margin: 7px 0 0 0;">To modify this template, place it into your Outlook editor.</p> saves own styles. paragraph Body Subtitle will be removed properly

Actual behavior:
after all steps I get this result:

<p style="font-size: 16.5pt; margin: 0">To modify this template, place it into your Outlook editor.</p>

reproducible on jodit playground