All the calls to the Termux:API will hang the process. E.g. running termux-battery-status on the Termux command line does not return any information and waits forever (Ctrl-C to break).

• Termux
  • Version 0.101 (from Google Play Store)
  • Version 0.118.0 (from F-Droid)
• Termux:API
  • Version 0.44 (from Google Play Store)
  • Version 0.50.1 (from F-Droid)
• Android 11 (Oukitel WP12 smartphone, with MediaTek processor)

It seems that battery optimization against Termux:API is the problem. Disabling the Settings ⇒ DuraSpeed option for all the system solved the problem. Unfortunately at the moment there is not an option to disable DuraSpeed for Termux:API only.

• Termux version
• Termux:Widget version
• Android

• only 1x1 widget available on Android 10 · Issue #45 · termux/termux-widget · GitHub