Color type item not updated on sitemap

I got an item of type color linked to a MQTT channel. When the color changes, the color wheel on the sitemap doesn’t. When I open it widget, the circle and slider are in the middle. An update occurs only after page reload (key F5). Does anyone has a solution for it?

OpenHAB 2.5.12
Linux version 5.4.83-v7+ (arm)


> smarthome:send Kitchen_Worktop_Light_Color "240,50,80"


Color Kitchen_Worktop_Light_Color "Color" {channel="mqtt:topic:mosquitto:<friendlyname>:color"}


Default item=Kitchen_Worktop_Light_Color