We know that operating system updates are always sensitive. There are many changes involved and these must be perfectly adapted to the hardware of each device. However, the user trusts that at least the general operation of the device can be free of serious errors, which is not what is happening with the Pixel 4a after its update to Android 11.

We have already told you on our site about the first errors that Google Pixels have faced after the arrival of Android 11. The first reports were not long in coming. In the case of the Pixel 4a, the “cheap” mobile of the Pixel 4 series, some users reported performance problems, that is, general slowness in the system after updating to the new version. Now, these problems seem to be continuing as new ones are added, as more users switch to Android 11.
Problems with on the screen
The Pixel 4a is Google’s latest device officially announced, although the Pixel 5 are just around the corner. The terminal suffered several delays in its launch and it did so with Android 10 in its gut. The terminal has received its share of Android 11, but as we say, the problems continue . According to the latest reports, it is the terminal’s touch screen that is weighing on the user experience .
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He is experiencing the dreaded ghost touches since his update to Android 11. The screen may not respond correctly when scrolling and tapping , or it may react automatically with random actions. At the moment the reason for these failures is unknown, but Google has already recognized the error and claims to be working on its solution.
And meanwhile?
Although the definitive solution must come from a system update, some users are revealing their own methods to alleviate these failures with the Pixel 4a screen . Some users claim that going back to Android 10 fixes the problem, while others advise removing screen protectors or modifying screen settings easily. There is no consensus on what works best, so it is a matter of testing in each specific case. At this time, the official Google reporting forums are still active with new users who are added daily to report the same problem.
Source>IssueTracker