I too am using Pega 7.2 and it works fine for me. Check if this is something specific to an env or happening across all envs.I raise the env point as your snapshot shows the DT rule form has't actually rendered properly, not sure if cache issue for your current env. If you see this is happening across envs and is unique to chrome only, the best way to solve this is via raising an SR.
Are you using chrome? because this issue is not with all browsers.I have this issue in all environments only with chrome browser and I don't think this is a cache issue for current environment because it is working fine in IE for the same env.The reason for not raising SR and posting this issue in this community is I wanted to make sure that this issue for everyone who are using chrome (Pega 7.2.1) before raising SR.