I am using git version

git version 2.20.0.windows.1

I have problem with adding *.txt files.
I have created a project. There was only PCB files. At the beginning.
I have commited it.
Then I have generated project with STM CubeMX.
I started adding files with

git add *.c 

command.
After sometime I see with

git status -u 

that there are a lot of *.txt files.
I add them with

git add *.txt 

command.
There is nothing in respond but when I do

git status -u 

there are still *.txt files marked as Untracked.
The path to the typical txt file looks like that:

D:projectssrmsrm_frmw_v10keilDriversCMSISLICENSE.txt

That file is not added.
But the weird thing that if i add txt file to this level

D:projectssrmtest.txt

it is added with no problem.
But if I add txt file one level deeper

D:projectssrmsrm_frmw_v10test.txt

it can’t be added.
But I can add directly specifying the path

git add D:projectssrmsrm_frmw_v10test.txt

file is added.

But I I put a test file like this in

D:projectssrmsrm_frmw_v10test.jjj

and call

git add *.jjj 

it adds this file.

What the hell is going on!!

Maybe my Gitis outdated and there is a bug in it?
Or maybe there are some diagnostic command to run?
Thanks.