Release 4.7.3

[jkasten2]

• [Fix] Heads-Up Displaying Previous Notification When Grouped on some devices by @jkasten2 in Fix Heads-Up Displaying Previous Notification When Grouped on some devices #1578
• [Change] Notification Activity Trampoline forward instead of reverse by @jkasten2 in [Change] Notification Activity Trampoline forward instead of reverse #1581
  • Fixes Xiaomi - Notification Open - Not foregrounding app #1494
• [Fix] Network Delayed Activity Trampoline by @jkasten2 in [Fix] Network Delayed Activity Trampoline #1583
• [Fix] crash when $ sign is in external user ID by @nan-li in Fix crash when $ sign is in external user ID #1589
• [Fix] NPE: use a getter for the current UserState by @nan-li in Fix NPE: use a getter for the current UserState #1590

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This change is 

[Ansh-Rathod]

Hey @jkasten2 is this miui problem notification not an opening app problem really solved cause I have been facing this issue for a long time and ig this fix is for android so what should I do to enable it in flutter SDK?

[nan-li]

Hi @Ansh-Rathod, this release works around the MIUI bug, so it should be solved.
If you are using Flutter, we will follow up shortly with a Flutter SDK release that will include this fix.

[nan-li]

Hi again @Ansh-Rathod,
The latest version OneSignal-Flutter-SDK was just released, which includes the MIUI fix.