I've been having major issues with CC/Adobe products for almost a year. I have spoke with and have had Adobe techs in my system trying to fix this at least 10x. They can't ever get it fixed.
It use to be, when I restarted my PC I would automatically login to CC. That no longer works. But now, after I login to CC, I open an Adobe app (Premiere, PS, AE, etc) I have to login again. Even more so, if I'm say logged in to Premiere and I open PS, I'm asked to login again then get booted from Premiere. So on and so forth. It's a nightmare. No Adobe tech can fix. Also, I'm using Adobe fonts and sometimes they do not load. Another nightmare.
Im on a Windows 10 Pro 64bit Dell Z840 workstation.
you should watch your oobe folder (which contains your cached sign in credentials) to see if anything in it is being changed between opening premiere and signing in and opening ps and being required to re-sign in.
your cached adobe credentials are stored in the OOBE folder.
Mac OS: \User\<user name>\Library\Application Support\Adobe\OOBE folder. To access the hidden user Library folder see*
Windows: \Users\<user name>\AppData\Local\Adobe\OOBE folder. To view the hidden AppData folder, see **