Just in a previous thread, I also own a CODE alarm for my Strada. I also experienced this intermittent auto-unlock. Since under warranty pa siya at that time ibinalik ko sa casa. Pero 3rd party pala installer nila so I was directed to WinterPine in Araneta Ave., Q.C. The technician just adjusted the alarm and it's since been 19 months since the problem at wala na siya.
Bring your car and alarm to your Honda dealer and just have it adjusted.