termux-dialog hangs

I'm having an issue with termux-dialog.
I'm running Android 6.0 on an Alcatel A466BG.

Here's how I can replicate the issue:

1. Restart phone and start termux.

2. Check that parts of termux-api are working by running the following
   $ termux-battery-status
   $ termux-notification --content "hello world"
   $ termux-toast "hello world"
   $ termux-tts-speak "hello world"
   $ termux-vibrate
   $ termux-dialog -l

3. Encounter an issue by running
   $ termux-dialog

   This hangs, then an android popup screen states "Unfortunately, Termux:API has stopped".

   Dismiss this by clicking "report", then in termux use crtl-c to get a prompt.

4. I can now rerun 2&3 above, with the same results (that is, even though android claims that Termux:API has stopped, the commands in part 2 still behave as expected, and termux-dialog still hangs with the same android popup screen.)

5. After rerunning 2&3 several times, eventually termux-dialog hangs without the android popup screen showing up. After that, all the commands in 2 (except termux-dialog -l) hang (with no error messages).

   If I exit termux, clear the cache of termux (which doesn't appear to do anything), and clear the data of termux:api, and then restart termux, all the commands in 2 (except termux-dialog -l) still hang.

   If I restart the phone (as in 1), then all the commands in 2 work again.

Start by reproducing the failure on Android 6.0 with termux-dialog and the other listed Termux:API commands, then compare the behavior before and after the phone restart. Trace the Termux:API entry point used by termux-dialog; done means the dialog opens without hanging or crashing and the other commands remain usable afterward.