i write you to have a support about magisk hide, on my Tanix Tx3 with firmware Build version: 20181210.
In particular i have installed magisk on my device with TWRP to hide the root permission at some application but this dosn't work correctly.
To hide the root permission on magisk I have make following steps:
to[LIST][*] installed magisk with TWRP[*] activated "magisk hide" from setting of magisk manager and then i have reboot the device;[*] inserted on section "migisk hide" the application "root checker" and then i have reboot the device;[*] checked with root checker application if magisk hide the root but the application (root checker) has detected root permissions
Furthemore, I tried to activated magisk hide from terminal emulator with "props" module but when i tried to verify the root permission on root check the result is the same.
in attach you can find the log by magisk, if it can help you to solve the problem