Troubleshoot by turning off with the remote only.In settings, there is an option to restart. By shutdown, I meant turning the TV off with the remote and the switch.
If Adguard resumes protection by not fully shutting down, then that could be your temporary solution - unless another workaround has been found.
If electricity usage is a concern, there's more tips to lower power consumption in the link below.
2021 Update - OLED and LED TV Power Consumption and Electricity Cost
We noticed another trend with the Max Power Consumption: the 4k TVs that require the most power are also some of brightest, which are all LEDs. Even if you get an LED TV, it doesn't mean it will need less power than OLED if you constantly watch HDR content at its max brightness.