Exercise Load / Acute Load - Seems like the device misses activities

I  have seen this several times now and it's getting a bit annoying.

I've been training for a while for almost every second day, but it looks like my Garmin device is not aware of it, even though I have 96 hours recovery, it acts like I did nothing on that specific day. I could not swim for a few days but I got to the pool on Monday and Tuesday. Garmin just ignored my Monday activity completely and last week's Thursday too.

According image shows that my training status goes down even to detraining (currently it's "recovery") - even though I'm swimming quite hard 200+ load 

If I check the Exercise Load - I can see my swimming on Tuesday, but it does not show anything about Thursday or Monday. I was clearly swimming on Monday and Thursday too.

Last Thursday:

Training Effect 

Anaerobic Capacity - Primary Benefit
4.1 - Highly Impacting Aerobic
3.7 - Impacting Anaerobic
281 - Exercise Load 

This Monday: 

Training Effect 

Threshold - Primary Benefit
4.4 - Highly Impacting Aerobic
2.4 - Maintaining Anaerobic
212 - Exercise Load 

Can someone tell me what's wrong here? Shall I contact Garmin or what?