@Benyamin2331 The firmware might not allow downgrade, and your firmware seems not to be the latest 1.13.1 firmware, but if there is any issue, you could check this thread as well: Remote Login via...

@mhamidjamil Check this Announcement: IFTTT Services Ending on July 31, 2020

@twatac You could update the latest firmware version directly, no need to install previous firmware first.

@Wedaras For comparison, you could connect the TV to your router WiFi or LAN port and test internet speed as well, if still only the TV has slow speed, it might be the network adapter issue on the TV.

@KingMaster Sounds quite strange, how about trying different Ethernet cable or different wall socket? When the issue happens, if you unplug the adapter and plug it back in without the Ethernet cable...

@koolesterol It seems the TP-Link home routers like AX10 doesn't support SNMP Settings.