Several issues with multiline text cell

[digital-ember]

I'm using mps-extensions 2023.2.2872.2b32f29 with

JetBrains MPS 2023.2
Build #MPS-232.10072.781, built on October 25, 2023
Runtime version: 17.0.8.1+7-b1000.32 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 11.0

I created a sample project with only one Root concept, which only has one string property. The editor is just using CellModel_Multiline.

Here is the behavior I observe but consider incorrect:

• CTRL+END inconsistently sets the cursor either to the end of text, or to the beginning of the last word. It seems to depend on navigations done before.
• CTRL+HOME has a similar inconsistent behavior: sometimes it navigates to the very beginning, sometimes to the end of the first word cell
• ENTER does not enter a new paragraph (maybe I'm wrong here, but I thought it should)
• SHIFT-ENTER adds a new line after the current line instead of before
• SHIFT-ENTER does not place the cursor to the new line added
• CTRL-SHIFT-LEFT/RIGHT only selects the range from the cursor to the current word beginning/end, repeatedly pressing it does not extend the selection to the next word sibling