Just purchased a Marq Expedition and received it last night. While I love the watch, I'm seeing a lot of heat rate drops. I'm using the rubber strap and wearing the device snugly. I can only imagine what it will be like with the leather strap. I'm not overly hirsute by any stretch of the imagination and no tats. I'm coming from a Fenix 5s plus and that device locked onto HR constantly. I ran a seven miler this morning with 419ft of ascent and the Marq registered my avg HR at 128 while in comparison the same run on Sunday averaged 155 on the Fenix. In fact I'm looking at the HR app right now and it's not registering my HR. Am I doing something wrong here or do I need to reach out to Garmin support? Thanks in advance.