I have this problem too. I use space to pan all the time, so it's impossible to work in 24.5. Guess I have to try and downgrade.
Other threads about the same issue:
https://community.adobe.com/t5/photoshop-ecosystem-bugs/24-5-hand-tool-became-unusable/idi-p/13830369
https://community.adobe.com/t5/photoshop-ecosystem-bugs/sticking-pan-and-zoom/idi-p/13833779
https://community.adobe.com/t5/photoshop-ecosystem-discussions/hand-tool-lock-after-releasing-spacebar/td-p/13631792/page/2
I cancelled my CC subscription a couple of years ago, since both Illustrator and Photoshop were so buggy and unstable that I couldn't use them anymore.
Now being forced to try Photoshop CC again (since CS5 and CS6 has this "click delay" bug in Windows 10 making it unusable), I see that nothing much has changed... Adobe keeps adding new bugs with every version.
I hope the competing companies will eventually push Adobe off the market, and I hope I'm still around to see it happen. It will be a day of celebration.