xterm issues on nano with LE11 over SSH

Hi,

I have just upgraded to LE11 beta to solve some deinterlacing issues, and it all seems to work fine apart from editing files with nano over SSH.

I am using SecureCRT but I see the very same problems with Putty: nano 7.1 shows kind of "one line more" (the name of the file) and every time I move the cursor (up/down/left/right) this line is displayed and then the screen is refreshed. The outcome of it is kind of screen flashing which makes editing almost impossible.

I have tried to change many settings in Putty/SecureCRT but nothing changes (every change just worsen things), I didn't have to touch any settings for LE9 o LE10, nor for all the other servers I connect to (customer servers for my job, and my local Rpi3 servers I have at home or my NAS or my Mac): they all work fine but nano on LE11.

Someone more skilled than me could maybe help me?

I attach a small video where you see that a cat works well, but a nano shows weird things on my screen (you can also check frame-by-frame)

I created a gz file which I renamed into .zip otherwise I cannot attach it

LE11_nano_video.mp4.zip

Thanks!

Luca

So, I am trying again because this issue really annoys me.

I have taken some screenshots, so I can better explain the problem.

TERM is xterm and I am using the same TERM config on my other Raspberries and Mac and terminals I am using when providing support to my customers. And SecureCRT is set up correctly.

Nevertheless, with GNU Nano 7.1 installed on LE11, every time I type a letter I see the diplay showing weird things, look here:

I can normally open nano, for instance with the kodi log

But as soon as I scroll down with the arrow key or if I want to type something, I first get this screen

and then this one

and then the display becomes stable again. This is very quick so it looks like the screen is flashing, and it's awful.

Also, pressing arrow key continuously will not make the cursor move fast.

This only happens with LE11 which has changed Nano version to 7.1, I think LE10 was using nano 3 or something

Other Rpi I am using have Nano 3.2 and it all looks good

I don't know if it's a nano issue or an LE11 issue.

Can someone help?

Thanks