Xbox series X recording gameplay on an external SSD bugs out

Not really...

Xbox Series X games / upgrades / updates has to be installed onto the Series X internal or expansion card SSD,

You can have Xbox One games on your external hard drive that will get an Series X upgrade but the games will need to be transferred to the Series X and then the Series X upgrade will need to be downloaded onto the Series X SSD,

As an example...

I have Marvel Avengers on my external hard drive that will get the Series X upgrade and I will transfer the game over to the Series X SSD ready to download and update the game to the Series X version when available.

I'm using a Series X and the recording is being done in the internal memory which is empty (only OS), all my games are played from external memory (SSD designed by seagate)

Fair enough, a slow internet connection is as good excuse as any.

Be aware however that while that drive will work on Series X, you won't be able to play Series X games directly from it. Series X games will require faster access and read speeds. My understanding is that the Series X games can be 'backed up' on an external
drive and then need to copied/moved over to either the internal SSD or the External SSD's that will be available for the machine.

The Series X will read and play Xbox One games from an external drive though.

Try recording directly to the Xbox Series X internal SSD, to see if the same issue happens, please.

So the external seagate ssd for xbox is usb3.0 with 500mbps read and write speed right? I have two of them and i see alot of people saying "its because the external ssds are too slow to play games on,you can only play series x or enhanced one x games on internal or the seagate expansion ssd card" but alot of external ssds are fast enough? No?