I've just tested the new x64 Beta on my PC, but the menu runs with approximately 1 FPS.
System:
AMD Ryzen 5 2600x
G.Skill RipJaw's 16GB DDR4-3200
MSI GTX 970
With Etcher I've installed RecalBox on a 16GB USB 3.0 Stick.
Roms are on a 4TB Seagate external HDD.
Pretty much unusable sadly 
@dalittlebosssam thank you for your answer. I actually thought my backups were damaged.
Whenever I exit from Kodi after the initial setup back to the Frontend, I can't start it anymore.
Still trying to figure out why.
Doesn't matter if I load my Kodi Backup or if I don't change anything at all.
After the first exit I can't start it again. It throws me back to Emulationstation after showing the Kodi 17.6 splashscreen.
Been trying to get it to run for the last 12 hours.
Anyone got an idea?
Using a Raspberry Pi 3B+, a 1TB Seagate USB HDD.
Another problem, as mentioned above, if I select an external storage, I can't SSH anymore. Every connection gets blocked.
@substring Anything I can do about it?
Another edit: After thinking about it ...
That would be strange as it has no problems in games. At all. It's only happening in Emulationstation. Nowhere else.
I'm confused.
@substring It was 2 - the Wireless Controller aka PS4.
Edit: Same happens with the 8bitdo NES30.
The pictures from the post above were with onboard Bluetooth enabled and no dongle connected.
I now disabled onboard Bluetooth and added my dongle. It works a bit better, but it's still hard to navigate through the Emulationstation menu. Still ghost inputs. Only the keyboard works flawlessly.
In-game everything is fine.
@substring Thank you for answering.
I usually have only the PS4 controller paired. The 8bitdo is never being used. Only tried it out to see if I also have the problem with that one as well.
Only the Rii i8+ with his own dongle is connected and my PS4 controller over Bluetooth
I've tried the evtest just now. Here are two pictures.
Strange is that I see the keyboard twice. And the test itself was too fast to see any manual input from the controller. Edit: You can actually see one from me.
I did not enable gpio controls. Isn't that related to multiple arcade controllers? I'll look it up.
Hey there!
A few weeks ago I switched to RecalBox and I absolutely love it so far.
I used some time lately to reorganize my library of games.
Before I had a little smaller library and ghost/phantom input just rarely happened. For example: When I scroll down the game list of a platform, it would just go on until I press another key.
Now that my library is bigger, it happens much more. Actually so often that I can't use my controller in Emulationstation anymore.
Here is what I use:
Raspberry Pi 3b
Asus BT 4.0 Dongle
2TB HDD
Sony Dual Shock 4
8bitdo NES30 Pro
Rii i8+ Keyboard
These input problems do not happen when I use the Rii i8+ Keyboard, which came with his own dongle.
It does happen with both Controllers. Doesn't make a difference if I use my BT Dongle or the onboard BT.
What I still need to try is if it happens when I use a cable connected to a controller.
What's the cause of the problem?
Since it only happens in the game list, I assume that the huge amount of scraped images are causing it(?)
Can you reduce it somehow? New/other Bluetooth dongle? Wait for the RecalBox Version for the 3b+?
Overclock higher than 1300Mhz?
Anything that could help is appreciated.
Thanks,
lexx