The error state of the ctrlX CORE is not directly connected to the motion app. so if you only reset the error in the motion the system will not recognize this.
See the pending diagnostic dialogue to see how clearing/confirming errors is done (e.g. use the developer function of your browser):
Or you could have a look to this topic where the error confirmation was done via the REST interface and NodeRed.
EDIT: Moved topic to ctrlX CORE.
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