Thanks for letting me know about the issue!

This is fixed in Textastic 10.8.6 which was released today.

This is fixed in Textastic 10.8.6 which was released today.

Can you please try if a restart of your device fixes that issue?

On my iPhone running iOS 26.1, that triple finger menu is displayed differently, not as in your screenshot. 

Here is a screenshot:

Good news! With the help of another developer, I found a way to tell the system that it should open files in the same window instead of creating a new one.

So this will be fixed in the next update.