I have considered trying Magisk again, but in the previous versions I tried on my Nextbook Ares 8A x86, Android 6.0.1 tablet, I lost root in less than a day, with it. That is unexceptable. I have never lost root with SuperSu, despite using many beta versions of it.
I follow the Magisk beta threads and look at the unofficial builds thread of it frequently, but am fearful of trying it again.
However, I do like the fact it is in active development, so the lastest unofficial versions may be much improved:
But, please provide as much information as possible if you experience that issue again
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