I'm working on getting a simple project together to try and recreate the issue and will post when I get it together.
I'm experiencing something similar to this thread from 2011
. Inside of a long form RichTextBox the "physical" position of the caret onscreen does not match the logical position of the caret and when inserting or deleting the effect is quite disconcerting.
What we have noticed is that the effect is accentuated primarily by the distance from the beginning of the text block. If the block of text is large (2K+) the offset is greater at the end of the document than near the beginning and, in fact, the first two or three paragraphs may not show any offset at all.
Font family and size do appear to have some effect on the problem but there does not appear to be any font/size combo (I worked hard at testing fixed-width fonts thinking they might not show the issue being, after all, fixed width) that works reliably.
From a layout perspective we have...
+ A master view that contains
+ A RichTextBoxRibbon
+ A Tab View that contains
+ A Wizard View on one tab
+ The RadRichTextBox within a user control
As I'm working on a sample project to illustrate is there any insight that might be offered if anyone else has run into this before and it was a simple fix?