Fenix 5 not tracking steps

I have noticed my watch has not been recording steps properly anymore in cycle mode. I have been cycling then doing a couple of kms on the treadmill. Normally it had recorded the steps fine in this setting. There was a software update the other day and since then it’s saying i have only done a few hundred steps when it’s clearly not the case. Has anyone else experienced the same problem? 
or am I going to need to stop cycle mode and change to record steps properly now?