Xfinity streaming last channel problem

I access Xfinity streaming on four Hisense TV's using Roku Ultra devices. Starting today on all the TV's, the Last Channel function shows the list of recently accessed channels with the current channel (leftmost in the list) highlighted. This requires me to navigate the list every time to choose the desired channel. Previously, the highlighted channel was on the last selected position in the list (i.e., if the Last Channel list contains five channels and I select the fourth channel from the list, the next time that I bring up the Last Channel list, the fourth channel from the left will be highlighted). This allows me to rotate through two to five channels simply by bringing up the Last Channel list and hitting Enter. If this new action is intentional, it is a ridiculously stupid change. I took the following actions to try to correct this: 1) I reset the Roku device. 2) I unplugged the Roku device and the TV for five minutes. 3) I verified that the Xfinity app was up to date. 4) I logged out of Xfinity and logged back in. 5) I uninstalled and reinstalled the Xfinity app and activated it by logging in. None of these actions had any effect. Given that this started today on multiple TV's, that was expected. Is this change intentional or a bug that you can correct?