Unwanted undo on display of the sugestion view

Let's make sure issue is not already fixed in latest builds first.

- [x] I verified I can reproduce this issue against [latest Integration Build of Eclipse SDK](https://download.eclipse.org/eclipse/downloads/)

## Steps to reproduce

From a fresh installation and clean workspace:

import local project.
and directly try to edit it.

I tried

write a line.

I expected: having a popup showing suggestion for autocomplete.

But got: it undo what i have done and put me in a other line.

## Here is some relevant log output

From `/.metadata/.log`
```

```

## Tested under this environment:
* OS & version: win11 pro 24H2
* Eclipse IDE/Platform version (as shown in *Help > About*): Eclipse IDE for RCP and RAP Developers 2025-03 (4.35.0)
* ...Anything else that can be useful...

## Community

- [x] I understand reporting an issue to this OSS project does not mandate anyone to fix it. Other contributors may consider the issue, or not, at their own convenience. The most efficient way to get it fixed is that I fix it myself and contribute it back as a good quality patch to the project.