Missing flash messages

[wetterkrank]

Issue: in Android, after making a POST request, native app requests index or show path twice (once as TURBO_STREAM, once as HTML), thus consuming the flash early.
Also happens in iOS, if we remove context: modal from the configuration.

android

19:32:47 web.1  | Started GET "/exercise_entries/new?date=2026-04-16" for 127.0.0.1 at 2026-04-16 19:32:47 +0200
19:32:47 web.1  | Processing by ExerciseEntriesController#new as HTML

19:32:51 web.1  | Started POST "/exercise_entries" for 127.0.0.1 at 2026-04-16 19:32:51 +0200
19:32:51 web.1  | Processing by ExerciseEntriesController#create as TURBO_STREAM
19:32:51 web.1  | Redirected to http://10.0.2.2:3000/days/2026-04-16

19:32:51 web.1  | Started GET "/days/2026-04-16" for 127.0.0.1 at 2026-04-16 19:32:51 +0200
19:32:51 web.1  | Processing by DaysController#show as TURBO_STREAM

19:32:51 web.1  | Started GET "/days/2026-04-16" for 127.0.0.1 at 2026-04-16 19:32:51 +0200
19:32:51 web.1  | Processing by DaysController#show as HTML

*flash is not shown*

ios

20:27:29 web.1  | Started GET "/exercise_entries/new?date=2026-04-16" for ::1 at 2026-04-16 20:27:29 +0200
20:27:29 web.1  | Processing by ExerciseEntriesController#new as HTML

20:27:32 web.1  | Started POST "/exercise_entries" for ::1 at 2026-04-16 20:27:32 +0200
20:27:32 web.1  | Processing by ExerciseEntriesController#create as TURBO_STREAM
20:27:32 web.1  | Redirected to http://localhost:3000/days/2026-04-16

20:27:32 web.1  | Started GET "/days/2026-04-16" for ::1 at 2026-04-16 20:27:32 +0200
20:27:32 web.1  | Processing by DaysController#show as TURBO_STREAM

*flash is shown*

Repo to reproduce here: https://github.com/wetterkrank/daily-log
It's a fork of https://github.com/joemasilotti/daily-log, with a minimal Android app based on https://native.hotwired.dev/android/getting-started