JPGs do not stay in grayscale mode when exported

[TundraGhost]

Every time I set an image mode to grayscale, then export as a JPG, and reopen in Photoshop, the mode is set back to RGB. Whereas if I use the Save As option, the JPG will open with the grayscale mode still intact. I'm wondering if anyone can give me an idea as to why exporting doesn't hold the grayscale mode, or if there is a fix. Turning on/off sRGB upon export does not seem to change anything. Thanks for any tips, and apologies if this is in the wrong section. 

[CoryShubert]

Hi @TundraGhost 

Try resetting Prefs for the Beta:

/Users/yourname/Library/Preferences/ Photoshop Beta Settings (Mac Ventura)

/Users/yourname/Library/Preferences/Adobe\ Photoshop\ \(Beta\)\ Settings (Mac)
C:\Users\user name\AppData\Roaming\Adobe\Adobe Photoshop (Beta)\Adobe Photoshop (Beta) Settings )Win)

Launch BETA Photoshop While Pressing The Keyboard Shortcut

With Photoshop closed, press and hold Shift+Ctrl+Alt (Win) / Shift+Command+Option (Mac) on your keyboard and then Launch Photoshop the way you normally would.

https://helpx.adobe.com/photoshop/using/preferences.html#Manually