UsersGroupsRightsManagementIT#createAndDeleteGroup is flickering

org.openqa.selenium.ElementNotInteractableException: 
element not interactable
  (Session info: chrome=83.0.4103.61)
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'e217cea81055', ip: '172.17.0.2', os.name: 'Linux', os.arch: 'amd64', os.version: '4.19.0-13-cloud-amd64', java.version: '1.8.0_242'
Driver info: org.openqa.selenium.remote.RemoteWebDriver
Capabilities {acceptInsecureCerts: false, browserName: chrome, browserVersion: 83.0.4103.61, chrome: {chromedriverVersion: 83.0.4103.39 (ccbf011cb2d2b..., userDataDir: /tmp/.com.google.Chrome.aarkJ3}, goog:chromeOptions: {debuggerAddress: localhost:36565}, javascriptEnabled: true, networkConnectionEnabled: false, pageLoadStrategy: normal, platform: LINUX, platformName: LINUX, proxy: Proxy(), setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: ignore, webauthn:virtualAuthenticators: true, webdriver.remote.sessionid: 462e6ee709c194f6bbf91fcb387...}
Session ID: 462e6ee709c194f6bbf91fcb387a5f62
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.openqa.selenium.remote.http.W3CHttpResponseCodec.createException(W3CHttpResponseCodec.java:187)
	at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:122)
	at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:49)
	at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
	at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:285)
	at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:84)
	at org.xwiki.test.ui.po.ConfirmationModal.clickOk(ConfirmationModal.java:45)
	at org.xwiki.administration.test.po.DeleteGroupConfirmationModal.clickOk(DeleteGroupConfirmationModal.java:41)
	at org.xwiki.administration.test.po.GroupsPage.deleteGroup(GroupsPage.java:109)
	at org.xwiki.administration.test.ui.UsersGroupsRightsManagementIT.createAndDeleteGroup(UsersGroupsRightsManagementIT.java:98)