Probably not correct way but it works. Run this commands in SSH console and you will be able to install addons.
cp -a /usr/share/kodi/addons/repository.libreelec.tv/ /storage/.kodi/addons/
sed -i 's|9.1|9.0|g' /storage/.kodi/addons/repository.libreelec.tv/addon.xml
systemctl restart kodiBetter would be to set links on web server where addons are stored (9.1 -> 9.0).
Seems gpiozero needs setuptools package which is not present on LE.
Can you try this version with gpiozero 1.5.0? virtual.rpi-tools-9.0.105.rpi2.zip
wget -O virtual.rpi-tools-9.0.105.RPi2.zip http://vpeter.libreelec.tv/RPi2/virtual.rpi-tools-9.0.105.RPi2.zip
unzip virtual.rpi-tools-9.0.105.RPi2.zip -d /storage/.kodi/addonsTry set to on Wait for network before starting Kodi: LibreELEC Settings [LibreELEC.wiki]
Working fine here. Refresh addon repository from context menu and try again. If still doesn't work post kodi debug log.
Great.
But I think you didn't had latest addon which fixes this freeze issue. That's why reinstall work.
When addon is updated old addon is first completely removed (only addon data is preserved) and then installed. Meaning that it basically completely reinstall itself.
Maybe you have some old version of system tools addon installed where screen has such problems? You need version 9.0.111. Check that. Or remove system tools addon, refresh LibreELEC repozitory and install addon again.
There is pvr.iptvsimple PR with this functionality but you need to build it yourself 
Timeshift by phunkyfish · Pull Request #217 · kodi-pvr/pvr.iptvsimple · GitHub
So I have to test the BCDC image ?
That's second test.
Also try using ntpd_tos_00 I posted.
Strange that first didn't work even if tos is set to 0. Maybe your issue is different 
Sure. libreelec-rpi2.arm-9.0-set-bcdc-0.img.gz
This image should work out of the box then.
It is not included in LE9 for RPi2.
Works perfectly fine here. Maybe it is something special to your setup?
IPTV Simple Client works for me on pi 3b+ with 9.0.0... strange...
Why would be strange to be working? 
Test image: libreelec-rpi2.arm-9.0-set-tos-ntp.img.gz
After it boots set tos with command below and reboot. Then time should be set with NTP.
cat > /storage/.config/system.d/ntp-set-tos.service <<EOF
[Unit]
Description=Iptables set TOS for NTP
Before=network.target
Wants=network.target
[Service]
Type=oneshot
ExecStart=/usr/sbin/iptables -w -t mangle -I POSTROUTING 1 -p udp --dport 123 -j TOS --set-tos 0x00
ExecReload=/usr/sbin/iptables -w -t mangle -I POSTROUTING 1 -p udp --dport 123 -j TOS --set-tos 0x00
RemainAfterExit=yes
[Install]
WantedBy=multi-user.target
EOF
systemctl enable ntp-set-tosWould be probably easier to patch connman to use TOS 0x00. Or run patched ntpd from http://autostart.sh/custom service. Or use curl approach.
Update: Seems there were at least one user with same problem Raspberry Pi 3 built-in WiFi SSH NTP Problem
I think message is clear: upgrade your wget. Or use suggested build host (Ubuntu 16.04.x (LTS)).
Ok, can you try
wget -O ntpd_tos_00 http://vpeter.libreelec.tv/tmp/ntpd_tos_00
chmod +x ntpd_tos_00
./ntpd_tos_00 -d -d -d -n -p pool.ntp.orgTomorrow I will try to make test image for you.
Setting different TOS could help according to [Solved] Time does not sync on Pi 3 and with official dongle - Raspberry Pi Forums
That points to some firmware/driver defect in RPI3 (it seems unable to forward IP packets with ToS != 0).
But kernel module is disabled and you can't test that.
I think LE guys should ask RPi guys if this is still and issue. Or someone should make you appropriate image to test. Or just use USB wifi stick
chewitt : ^^^^
Well, I newer saw this issue in real life. So someone else would need to step in to help you.