Microsoft has released two new Windows 10 Insider Preview builds:

Announcing Windows 10 Insider Preview Build 18343
Announcing Windows 10 Insider Preview Build 18841

Announcing Windows 10 Insider Preview Build 18343

General changes, improvements, and fixes for PC
We fixed the Connected Standby issue that resulted in us blocking PCs with Intel64 Family 6 Model 142 and Intel64 Family 6 Model 158 processor model. If your PC was unable to take Build 18342 from earlier this week due to having one of these processor models, you should be able to take this flight!
We fixed the issue that required an additional reboot when performing Reset this PC and selecting Keep my files on a device that has Reserved Storage enabled.

Read full article @ Windows Team Blog

Announcing Windows 10 Insider Preview Build 18841

General changes, improvements, and fixes for PC
Windows Sandbox now supports configuration files! These files allow users to configure some aspects of the sandbox, such as vGPU, networking and shared folders. A blog post to explain this new feature is available here.
Windows Sandbox now captures hotkeys in full screen.
We fixed an issue where Windows Sandbox would not start on localized builds.
We’ve done some work to improve error reporting in Windows Sandbox. Now the error dialog includes the error code and a link to the Feedback Hub.
We fixed an issue where Windows Sandbox was unexpectedly throwing an error due to referencing a deleted file under Windows.old.
We fixed an issue where if you unpinned groups from Start, apps might end up thinking their tiles were still pinned.
We fixed a recent issue where if you hid the search icon in the taskbar, a number of win32 apps would unexpectedly redraw when opening the Start menu.
We fixed an issue resulting in the Search pane becoming truncated if launched after rotating the device orientation from horizontal to vertical.
We fixed an issue where Settings would sometimes crash when opening “Advanced Display Settings” from Display Settings.
We fixed an issue where it wasn’t possible to add a drive to the list of folders to exclude when setting up Enhanced Search in Settings.
We fixed an issue where there were unexpected characters in the text under the Storage Sense listing for temporary files.
We fixed an issue resulting in certain games no longer rendering UI updates (appearing visually stuck) after using Alt + Tab to quickly switch away and back to the game.
We fixed an issue resulting in the taskbar blinking if an AC adapter was attached when the device had less than 20% battery.
We fixed an issue resulting in the taskbar disappearing for a second when dismissing Start/Cortana/Search on a secondary monitor.
We fixed an issue resulting in File Explorer potentially hanging when trying to rename, delete, or move MKV files in the recent flights.
We fixed an issue that could cause Windows logon to forget the last logged on user, and instead would display the sign-in prompt for the default user from the list after dismissing the lock screen.
We fixed an issue resulting in CDPUserSVC using an unexpectedly large amount of CPU for prolonged periods of time.
We fixed an issue where the newly added popup window shadows might unexpectedly stop appearing after using your PC for some time.
We fixed an issue impacting UWP apps resulting in entries under a “…” that launched other apps not working after the first time the secondary app was launched.
We fixed an issue resulting in the left and right arrows on the touch keyboard inserting 4 and 6, respectively, in certain languages.
We fixed an issue resulting in the game bar record and broadcast options unexpectedly not working in recent builds.
We fixed an issue impacting Emoji Panel and Clipboard History reliability.
We fixed an issue in Ease of Access’s Cursor and pointer settings, mouse pointer size and color are now retained on upgrade. There is a remaining issue with mouse pointer showing white color instead of the selected color after signing out and signing back in.
When using the Magnifier with larger pointers, it pans smoothly as the pointers change shape.
We fixed an issue where navigation mode on Orbit braille display could not be changed.
We fixed an issue where Narrator paused unexpectedly when reading through a PDF.
[ADDED] We fixed the issue that required an additional reboot when performing Reset this PC and selecting Keep my files on a device that has Reserved Storage enabled.

Read full article @ Windows Team Blog