Thank you for your reply!
The problem is not on the external browser, but into Control itself.
I've edited the project to replicate the bug.
Write something (this is a tst) -> Save as Html -> Load Html document -> Add letter (this is a test) -> Save as Html -> Load Html document
Now you'll see "this is a t e st" instead of "this is a test"
Thank you
Attachment:
RTE_Sample_Nuget_41762ec0.zip