iOS/iPhone image download problem

[aromicreativi]

Bug report

(gallery app 15.0.0)

Steps to reproduce

1. login to owncloud web interface with your iPhone
2. browse any image folder
3. a) try to download an image from the ... > download buttons
4. b) open an image preview and try to zoom/save

Expected behaviour

You can save the fullsize image to your iPhone photo gallery

Actual behaviour

a. the download button doesn't start a download action because of iOS (Safari?) limitations to user action required from the use to download
b. you can't (zoom?) open the fullsize image to download it by pressing on the image itself (touch and hold)

Server configuration

Operating system: (any / ubuntu 16.04)

Web server: (any / apache 2.4)

Database: (any / MariaDB)

PHP version: (any / 7.0)

cloud server: ownCloud

cloud version: 9.1.5.2

Updated from an older installation or fresh install:

List of activated apps:

App list

Paste the list of applications here

The content of config/config.php:
{
"system": {
"instanceid": "ocm2ol2fawco",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
REMOVED
],
"datadirectory": REMOVED
"overwrite.cli.url": REMOVED
"version": "9.1.5.2",
"dbtype": "mysql",
"dbname": "owncloud",
"dbhost": "localhost",
"dbtableprefix": "oc_",
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"logtimezone": "UTC",
"installed": true,
"mail_smtpmode": "smtp",
"mail_from_address": REMOVED
"mail_domain": REMOVED
"mail_smtpauthtype": "LOGIN",
"mail_smtpauth": 1,
"mail_smtphost": REMOVED
"mail_smtpport": "25",
"mail_smtpname": "REMOVED SENSITIVE VALUE",
"mail_smtppassword": "REMOVED SENSITIVE VALUE",
"loglevel": 1,
"maintenance": false,
"theme": "",
"trashbin_retention_obligation": "30, 30",
"preview_max_x": 800,
"preview_max_y": 800,
"preview_max_scale_factor": 1,
"activity_expire_days": 30,
"filesystem_check_changes": 1,
"redis": {
"host": "localhost",
"port": 6379,
"timeout": 0
},
"updatechecker": false
}
}

Config report

Paste the config here

Are you using external storage, if yes which one: smb share

Are you using encryption: any

Are you using custom gallery.cnf config files: no

Web server error log

Web server error log

n.a. (works on android)

Cloud log

Cloud log

(any / can't test now)

Client configuration

Browser: Safari on iOS / maybe others on iOS

Operating system: iOS

Browser log

Browser log

n.a.