Why Swiftkey not visible in OxygenOS 3.1 Search?

I have installed Swiftkey in my system. However, search does not show it. Going to play store, I see it is installed, and only there, I can open it. Fig. 1 Search successful, Fig. 2 Swiftkey visible in Play Store, Fig. 3 Open button for Swiftkey, Fig. 4 Frontend of Swiftkey, Fig. 5 State of application after disabling and force quitting it, Fig. 6 State of application after disabling, force quitting and "uninstalling" it It started to persist in OO 3.1. I created the ticket #712004 about the issue in Oneplus technical ticket system. Uninstallation attempts ---- Unsuccessful uninstallation witohut disabling and/or force stopping application first. - I pressed uninstall the application. However, doing so, it is not really uninstalled. You see the situation in Fig. 3. Reboot the phone, and you still get the same result. You cannot uninstall it by dragging the icon to uninstall menu because no such icon exists. Procedure for the partial uninstallation of the application i.e. deactivation, since there exists an evidence about its existence in Fig. 5 in the system 1. Press the Menu key and choose Settings → Apps → Manage applications OR tap 'Apps' (depending on device) 2. Scroll down to and tap SwiftKey 3. Force stop application 4. Disable application 5. Select 'Uninstall' in Play store now; OR uninstallation process will automatically start if you selected it before force stop and/or disable 6. Reboot **Output**: the application is not active but we can see the application is still in the system register in Fig. 6 although we diasbled, force quitted and "uninstalled" it in Fig. 5. Phone: Oneplus two OS: OxygonOS 3.1