So it would seem that it's not LE but the add-ons that are causing the issue. I'd check on the relevant forum for each add-on.
52 degrees seems to be about normal - especially if it is in a case, or a warm room. I don't have a Zero but do have an RPi1B+, so similar, and that was running around 50 degrees in a case at idle.
Firstly I would confirm it is not the youtube addon that is causing the problem.
Boot your RPi and leave it running for an hour or two. If you can still connect then it sounds like the addon is the issue.
To provide more information, enable debugging in Kodi, run youtube until it fails then provide the log file HOW TO:Provide Logfile - LibreELEC
I doubt it is overheating, to check, run the addon and then with ssh run
cputempThe think the best you can do is ssh into your RPi and shutdown Kodi, then when you're ready to use it again, ssh to restart Kodi.
systemctl stop kodisystemctl start kodiIf it's just internet activity, you can turn off the network in Libreelec System configuration.
Glad you got it working.
Can you add [Solved] to the beginning of the title. Tnx
I think the fundamental problem is that the device is POWERED off. There is nothing running, so there is nothing to monitor key presses or anything.
The best you could do is use a RF plug remote or the newer "phone" controllers. Or, perish the thought, flick a switch.
I guess a simile would be modern cars that switch the engine off when you're idle but start again when you put you foot on the accelerator. However when you switch the engine off with the key - no matter how many times you hit the accelerator the car will just not start.
I've had great success with Hifiberry DAC's and ebay Chinese clones ~£10 via an amp, either phono or SPDIF depending on the Amp (All work on LE). The Hifiberry AMP would contain it all in one place but it is expensive
You are correct - they need different kernels.
If that works can you add [Solved] to the front of the title.
When you say rainbow square, do you mean full screen or just in the top right hand corner. If the latter it's a hardware issue of lower power < 4.65v, but it should not be there as I'm sure the kernel was changed to show a yellow bolt of lightning.
A screenshot or photo would help if something different.
Try another PSU - just because it SAYS 5v 2amp it doesn't mean it will always supply that.
Also you don't mention what else is attached to the USB ports, GPIO pin, Camera? LCD screen?
Have you tried downloads – LibreELEC and select on Direct Downloads "Raspberry Pi V1 or Raspberry Zero" or use the Libreelec USB SD creator for your platform.
1) What have you installed LE on?
2) Ubuntu server accessing media via upnp, smb, nfs, or other?
3) Via ethernet or Wifi
4) Are you using the Kodi 17 advancedsettings.xml - they are different than Kodi 16.
5) Where are the details of the logs when the error occurs?
cat /storage/.kodi/temp/kodi.log|paste and supply the url
I would boot with the old SD card, make a backup and use sftp (filezilla will work) or samba the backup file to your Mac or Windoze machine. Shut down your S905 machine and boot with the new SD card and then reverse the process to put the backup file in a suitable location, and then restore it.
If that still fails you can still delete/rename/move files with ftp.
Alternatively you could use win32diskimager to read your old SD card and then use that image to write to your new SD card (However, on some occasions that will not work if both SD cards are the same size - and definitely won't work if the new SD card is smaller.)
If the new card is larger you will need to resize it - see thread-6086.html for hints.
I'm sure there is a SIMPLE file - called something like "resize_on_boot" you can put in something like .config which will resize the file system automatically, but I don't know the exact details. Maybe someone else can comment on this.
I don't know if your particular device will work with LE but I have a number of 2.4GHz USB keyboards, and Controllers that work without issue.
As for voice activation, there are a number of add-ons that may or may not work in Kodi (It seems to be a hit or miss).
If your interested in just controlling and using voice activation in Kodi have you considered Yatse on your android phone or tablet. That has a remote and has voice activation (Pause, play etc)
I guess if you don't intend to use Kodi for a couple of days, shut Kodi down with "systemctl stop kodi" and leave the RPi running. If all seems Ok after that then it's probably Kodi, if not then the Kernel.
Can't really help - you can install them at your own risk - but if they don't work then don't ask for help here.
Paid subscriptions - are nothing to do with Kodi.
I'm sure you could find a legit streaming service if you look.
Please use different threads for different problems.
I'll try and answer some of your issues.
1) Is there a way to power on RPi 3 - NO, unless you use a radio controlled power plug or IOT power plug or wife 
2) EASEUS Partition Master - Why not use the Windoze LE installer?
3) Also, my RPi 3 show as ARMv7 instead of ARMv8. - Yes
Turn ON ssh password as you haven't provided a public key.
BTW: You can access your files via the Kodi file manager.
Been there, seen that, got the T-Shirt. You need to make sure that the NFS settings in OMV are insecure (This is because Kodi accesses the resource as root and needs elevated permissions.)
So it will look something like this (From memory - so it might not be precise)
/my/nfs-export 192.168.0.2/24 (rw,all_squash,insecure)
Both are available, I guess only you can decide if they work correctly. However, be aware that if they are classed as banned addons or from a banned repo, then LE will NOT offer any support for your device.