Inaccurate Calculation in Chronic Load

Which watch is it? Older watches without the HRV Status or watches with older firmware require a recent VO2max update, and newer watches need recent HRV Status. Though, it is strange that the Acute TL does update. In your pace I'd look up the forum for your specific watch model, and/or contact the Support. 

At least on my Forerunner 965, there's a limit on how low the chronic load goes. For me that's also 219, but I'm not sure if that bottom limit is calculated from some other metrics. When your "real" chronic load goes back above the limit, then the shown chronic load starts updating again.

I think Garmin does it this way so that the calculated load ratio is more useful if you are sick for some time etc, as you then see the load ratio based on a "minimum recommended load" instead of the real 4-week average that has dropped a lot. (And if chronic load could drop to 1 for example, then doing a single short base run could give you a load ratio of 60, which would be completely useless information.)

Bitti said:

you then see the load ratio based on a "minimum recommended load" instead of the real 4-week average

Yes, I think that's indeed accurate. I checked couple of years of the history of my Training Status. I do not have many periods with low Chronic Load, but the lowest value I found a year ago, is also 219, so it looks like it is really the lowest possible Chronic TL.

thanks to you all. mine is instinct 2 and supports HRV status. I'll contact the support and update when it is resolved.

4339207 said:

I'll contact the support and update when it is resolved

Frankly, it does not look like there is anything that needs to be resolved. It looks like it works as designed - as Bitti correctly spotted, the Chronic Training Load cannot drop under 219, and since your ATL was and still is pretty low, you just have to wait a few days more before the CTL rises high enough to surpass the 219

At the same time of the drop.is your training status also missing data? Thus has happened to me on 4 occasions after having to remove and re add my watch. 

you can see the gap in training status after re adding the watch and also the drop in training load/chronic load. This caused my productive status to go to crap and screwed my Garmin half marathon training plan to just keep suggesting recovery runs during my peak phase 

yes I wore the watch for just about an hour on CL drop day. It might be a cause...

For those you are waiting for updates: CL started to climb again after a week of workout break.

at the start of CL change the AL(black, 240) was lower then changed CL(orange, 245) but weighted sum principle  does make sense. Still don' understand the CL drop.