Hi @Juksey,
There is a new version of firmware that fixes the known DNS resolution issue, however the general rollout to all customers is currently paused as TalkTalk are making a further small change to the firmware.
It may be possible for the staff here to specifically push the latest version to your router, they should be able to reply to this topic tomorrow to advise.
If they can't push new firmware at the moment, then the other options are that they could send you the Huawei router as a replacement, as this is not affected by the issue. Alternatively, if you are comfortable with logging into the Sagemcom and changing a setting then you may well be able to stop the issue from happening, but it is only a good idea to try this if you have a fairly simple home setup (i.e. just devices that need to access the internet), if you have devices that need to talk to each other and rely on your router to provide local DNS for the devices to find each other, then trying this workaround is probably not appropriate, as it may stop those devices from being able to see each other.
