Indent Default Settings have Changed

Hi folks,
About a week ago when the lasted 5.0+ changes took place, I noticed that my TinyMCE Advanced default setting for the standard “Increase Indent” had been changed.
Before, I got: ‘<p style=”padding-left: 30px;”>’
Now, I get: ‘<p style=”padding-left: 40px;”>’
I am using the Classic Editor (TinyMCE).
I tried rolling back this and related plugins, but it made no difference, so I guess it has been changed in WP core.
Can someone advise how to change the TinyMCE Advanced Decrease/Increase Indent buttons default back from 40xp to the previous 30px standard ?

Regards and thanks,
Angus