After updating to the current version is an error in the graphical representation at activity reaching the target cadence.
In the desktop version the representation in the image below is correct.
Did you report it to Garmin Support? I am afraid that here on the community forum it has little chance to be seen by anyone from Garmin.
I also reported to Garmin support. I also posted on the forum because it may appear, the same error to other users. Thanks.