scratch removes "execute" permission upon saving

Steps to reproduce

20:07:58 ~ $ echo "echo \"working\"" > test.sh

20:08:22 ~ $ ll test.sh
-rw-r--r-- 1 tester users 15 Jan 29 20:08 test.sh\

20:08:25 ~ $ chmod +x test.sh

20:08:36 ~ $ ll test.sh
-rwxr-xr-x 1 tester users 15 Jan 29 20:08 test.sh*

# open scratch and then close it

20:08:39 ~ $ scratch test.sh
[INFO 20:08:45.136709] [Application:83] Scratch version: 1.0
[INFO 20:08:45.136789] [Application:86] Kernel version:
[DEBUG 20:08:45.137845] [Settings:155] Loading settings from schema 'org.elementary.Scratch.SavedState'
[DEBUG 20:08:45.138470] [Settings:155] Loading settings from schema 'org.elementary.Scratch.Settings'
[DEBUG 20:08:45.139042] [Settings:242] Unsupported settings type 'GStrv' for key 'plugins-enabled' in schema 'org.elementary.Scratch.Settings'
[DEBUG 20:08:45.139144] [Settings:242] Unsupported settings type 'GStrv' for key 'opened-files' in schema 'org.elementary.Scratch.Settings'
[DEBUG 20:08:45.140187] [Settings:155] Loading settings from schema 'org.elementary.Scratch.Services'
[FATAL 20:08:45.145573] [Gtk] gtk_menu_shell_insert: assertion `GTK_IS_MENU_SHELL (menu_shell)' failed
[FATAL 20:08:45.145655] Scratch will not function properly.
[FATAL 20:08:45.145733] [Gtk] gtk_widget_show_all: assertion `GTK_IS_WIDGET (widget)' failed
[FATAL 20:08:45.145794] Scratch will not function properly.
[INFO 20:08:45.500888] [Tab:103] Saving: /home/tester/test.sh

20:08:46 ~ $ ll test.sh
-rw-r--r-- 1 tester users 15 Jan 29 20:08 test.sh

20:08:51 ~ $ ./test.sh
bash: ./test.sh: Permission denied

I'm using version at commit 536