Apple Watch adding excess standing hours and exercise minutes

Wondering if anyone else has had their watch suddenly add standing hours and exercise minutes. I have now had 3 different events while weight training using Playbook App. Every time it happens I am on a minute rest and check a notification - Instagram message, email etc. Suddenly I get a congratulations that my exercise minutes are closed and and my standing hours are closed. The watch indicates I have excercised non stop since midnight. Calorie count is unchanged so of course it is way off. Wondering if anyone else experienced the issue or maybe it is a Playbook issue?