[Xiaomi Mi A1 Guides, News, & Discussion] birdie:
Found at the official MIUI forum:

Xiaomi Mi A1 issues and missing features for Android 8.0 Oreo January 2018 update

I wonder if XDA users have found something else.

Click CONFIRM for the bug reports that you want to be fixed​

The issues below are confirmed to be present on all Xiaomi Mi A1 devices for the January 2018 Oreo update.

[NEW] [Android 8.0 January] If the screen is off but the phone is not locked notifications make the screen light up but there are no notifications on the screen! That's a January 2018 regression. Bug report.

[NEW] [Android 8.0 January] SMS text messages backup doesn't work: "Waiting to backup". Bug report.

[NEW] [Android 8.0 December] RCS Phone/Service instead of Android System in battery stats - that's an Oreo regression. Bug report.

[NEW] [Android 8.0 December] Launcher3 bug: icons shape can only be changed if Developer mode is enabled. Bug report.

[NEW] [Android 8.0 December] The phone ignores the Contacts app settings and always uses but doesn't show SIM contacts. Bug report.

White noise for both bluetooth and analogue (3.5mm jack) headphones (slightly improved in the December 2017 update). Discussion. Older discussion. Bug report. Older bug report.

Low light camera performance is horrible for photos and especially for videos due to missing EIS and Camera2API.

High Android System and Android OS power usage/battery drain (reproducible under Oreo as well). Bug report.

Things which Mi A1 users and developers are craving for:

Camera2 API and EIS are not enabled even though both are perfectly supported by software and hardware but disabled only because ... no idea - not to compete with Pixels, I guess. When rooted the solution is to edit build.prop and add persist.camera.eis.enable=1 and set persist.camera.HAL3.enabled=1 ). Bug report.

Add an option to configure display color temperature: there are two very different matrices for MI A1 one of which has a coldish (bluish) hue, another one is warmish (reddish). That also affects how photos and videos are percieved.

Wi-Fi: 40MHz bandwidth for 2.4GHz mode is disabled in software even though hardware is capable. For rooted devices it can be reenabled by editing /data/misc/wifi/WCNSS_qcom_cfg.ini and setting GChannelBondingMode24GHz = 1. Bug report.

The new Google Camera App with HDR+.

There's no option to swap "Back" and "Apps Overview" capacitive buttons. If it's stock Android why it follows Xiaomi's conventions? Bug report.

FM module is present but there's no app for it and it's not exposed to apps (aside from dialling *#*#6484#*#*).

Edit 2018-01-30: The kernel sources for the MI A1 have finally been released - unfortunately they are for Nougat.

Nice to have features:

Gestures: double tap to wake, lift to wake and others which are present in Google Pixels.

Configuring the lighting time of the physical keys.

Making it possible to keep the physical keys always on and configuring their brightness level (also depending on the time of a day).

Bug and feature requests which have been rejected by Xiaomi moderators (what?!):

[Android 8.0] A visual glitch: WiFi/Cellular Indicators have additional dynamic traffic flow symbols which shift the icons to the left of the indicator. Bug report. Here's

an app to fix a jumping traffic indicator

.

[Android 8.0] "App network access" feature (which allowed to configure per-app WiFi/Cellular access) is no longer present. Bug report.

[Android 8.0] Scheduled power on and off is no longer present. Bug report.

There's a completely unnecessary 1.5GB SWAP partition which causes a tear and wear of the internal storage. Bug report.

These issues need verification:

Some people experience lags and jitters while scrolling, including scrolling in the system settings ( https://youtu.be/wu4CR9tOw8o ). The source of the problem is not known at the moment and the issue doesn't look widespread, i.e. only certain units are affected. Installing the Google Now launcher mostly fixes it.

[Needs root to check] CPU usage monitors cause disk write activity (probably an Android OS bug - need a confirmation from Pixel owners). Discussion. Bug report.

Fixed in the January 2018 update:

[Android 8.0] If you enabled DND mode in volume change UI in Android 7.0(using system UI tuner), in Android 8.0 you will either see empty space or DND icon will be cut off. Bug report.

[Android 8.0] You cannot interact with ambient display notifications. Also if your phone is not locked but the screen is off, you cannot answer an incoming call from the lock screen. Bug report.

[Android 8.0] There's no UI/setting to enable fingerprint swipe notification gesture. Bug report.

[Android 8.0] Under some circumstances the GPS icon might stuck. Bug report.

[Android 8.0] Certain users report that BlueTooth is seemingly draining their batteries. Bug report.

Bad audio for video recording. When rooted the solution is to edit build.prop and set ro.qc.sdk.audio.fluencetype=fluencepro. Bug report.

SIM is "HD Capable" icon..

Erroneous "rapid charging" message.

[Android 8.0 December] Lock screen notifications font doesn't match system settings - it's much bigger. Bug report.

Fixed in the December 2017 update:

Pressing the Home button while being on a second/third/fourth launcher screen doesn't return to the primary home screen. Bug report.

Fingerprint scanner became quite slower with November 2017 update. Bug report.

Complete changelog for updates: three(!) changes for a 1GB update just don't cut it. A better changelog was posted for the December update.

Fixed in the Oreo update:

It's not possible to install the Google Phone app (it does support dual SIM phones). Good bye SPAM protection and caller ID. Why? Bug report.

Xiaomi Mi A1 Contacts app is a different app than Google Contacts for no obvious reasons. Bug report.

Google Assistant sometimes doesn't speak. Discussion. Bug report, another bug report.

The camera app uses a zoom lens instead of a normal lens for recording video. Discussion. Bug report.

Some people report that the fingerprint scanner is still not as snappy as in the October 2017 update. Discussion.

To be updated.