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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 22.1.1.2
Operating system and version (eg, Ubuntu 20.04): don’t know - shared hosting at all-inkl
Apache or nginx version (eg, Apache 2.4.25): don’t know - shared hosting at all-inkl
PHP version (eg, 7.4): 7.4
The issue you are facing:
For some time (i.e. for several upgrades of NC and NC client) we are facing that files come back after deleting, no matter whether deleted on the web interface or in Finder (Mac). This affects External Folder and “normal” folder alike. Encryption is turned on.
Is this the first time you’ve seen this error? (Y/N):n N
Steps to replicate it:
- Delete files
- wait
- Refresh - files are back
The output of your Nextcloud log in Admin > Logging:
{"reqId":"6se7qLJPdtOVlr8193ae","level":3,"time":"2021-09-04T15:27:57+02:00","remoteAddr":"","user":"--","app":"PHP","method":"","url":"--","message":"Directive 'allow_url_include' is deprecated at Unknown#0","userAgent":"--","version":"22.1.1.2","id":"6133745e180da"}
{"reqId":"YTN06aNJbfQa5rFfSkBQ8AAAACE","level":0,"time":"2021-09-04T15:30:17+02:00","remoteAddr":"212.186.68.46","user":"xxx","app":"files_sharing","method":"GET","url":"/index.php/apps/logreader/poll?lastReqId=YTN06aNJbfQa5rFfSkBQ7wAAABw","message":"/appinfo/app.php is deprecated, use \\OCP\\AppFramework\\Bootstrap\\IBootstrap on the application class instead.","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Safari/605.1.15","version":"22.1.1.2","id":"613374e94845d"}
Often I see:
{"reqId":"SejTNzNoLyZeoxCtdw7B","level":1,"time":"2021-09-05T12:04:01+02:00","remoteAddr":"","user":"--","app":"encryption","method":"","url":"--","message":"Signature check skipped","userAgent":"--","version":"22.1.1.2","id":"61349619e7bb7"}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
what part is needed?
The output of your Apache/nginx/system log in /var/log/____:
not available
Cheers,
Ralph