Invalid security token

It happens when i get automatically logged out by joomla because of inactivity.
And when I then login again and try to edit a "Costum Code" in the Template Creator, then I get this token error.

I have no security plugins installed in Joomla and the website runs on a hosted web server.

ok then in this case : " after a long period of inactivity"
for now you are the only one to report this problem
I already had this situation, but as soon as I login again, the requests in Template Creator CK are working again

I think that this is a problem related to a cache
you have not answered to the question about the local/hosted server and the security software

I don't have any caching enabled in Joomla 4 and my website is running an a hosted web server with PHP 8.1.

ok
it is quite impossible for me to reproduce the issue
I could try on your website if you give me a login and set the session time short, e.g. 10-15 min max
I can leave the session opened and see if I get the same as you

else you can also inspect the token in the cookies list in your browser console, and check when you get the problem, if the session cookie has been updated and check in the request from TCK if you have the old cookie still sent

I will try to install a second Joomla with only with Template Creator CK and see what happens.
If I still get this problem then I will send you all the logins.