On 7.1.2 I was having this issue, and using version 7.1.28-21 took care of it.
I decided to try O DP3 on my Nexus 6P today, and tested version...
Sorry but there is an issue with the forum where it can't send out emails.Because of this the forum is in read-only mode at the moment.
You can find the currently known issues with Tasker and possible workarounds here.
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