Smartthings Garage Door Sensor Not Working

Its has been working for long time now but was wondering if there is a better setup i should have.
Smartthings garage door sensor not working. Just purchased smartthings hub v2 and 4 multi sensors. Make sure you have the flat larger face of the sensor mounted on the door vertically without the magnetic contact. Any suggestions would be greatly appreciated. I have changed the st multi sensor to a smartsense garage door multi sensor and created a virtual momentary switch that trigers the linear device.
All the sensors are within 30 40 feet of the hub i have tried repairing the sensors turned off hub for 15 minutes but noting seems to correct this issue. It is possible that through vibration the wire connection to the garage door opener may have worked loose over a year. Take take in between the manual open close and then trying to do it with the app. Was this article helpful.
Is this the best route to go. Smartthings classic app only if you re using the multipurpose sensor on your garage door it may not be mounted properly. It looks like my current garage door opener is failing and as i replace it i would like to get something that works with smartthings. Check the wires ensure they are connected nicely and then open close manually and then check open close from the app.
I have been using the linear fs20z 1 zwave controller with a smartthings multisensor to control my garage door. Set aside the smaller magnet portion of the sensor not needed for sensing garage door status orient the main sensor vertically with. The problem is sometimes the sensors don t seem to change status from open close.