Sorry to hear about the trouble. Could you please ensure that you have the latest version of Adobe XD which is 31.2.12 and if it is already updated, I would request you to quit Adobe XD and reboot the device. If it still doesn't work, please un-install the application using https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html
Once uninstalled, please re-install and let us know how it goes, we'll try our best to help you with it.
Hi Thanks for the replay. As i mentioned after restart the application, it works perfetly. it is not possible to restart every time. some times the gradient eyedropper is missing too. i will update the xd regulerly.
Thanks for confirming. This is strange, I'd recommend re-installing the application using the cleaner tool(Link shared above) and let us know if this helps or if you need any further assistance.