Bug marking watched/unwatched

I’ve had some trouble with my current series I’m watching.
It has somewhat 300 episodes and not really sorted in seasons (read dragon ball z)
And I noticed the later episodes was marked as watched but I havn’t marked them or watched them yet.

So I tried marking them as unwatched, wich resulted in all the episodes I’ve seen also got marked as unwatched…
Tried with single episodes and it keeps changing 2 episodes instead of 1

any tips on how to fix this?

I’m seeing a very similar issue (using Mac OS). The marked as watch doesn’t seem to holding the selected status. Keeps reverting to other, in my case, unwatched.

I’m facing the same issue. I record a video what is happening https://goo.gl/1uAiFu
Has any solution for that?