Windows clients polls too frequently

I’m using Windows client 2.5.4 and I’ve noticed that it contacts the server more frequently than it’s supposed to. The documentation says the default poll interval is 30 seconds but looking at the server logs it polls at least 4 times each minute. I’ve played around remotePollInterval in owncloud.cfg and it has some influence on the interval, however the frequency is always much higher, more than twice the setting or even more frequent.

Here are sample segments from my server logs for the default, 60000 and 120000 interval settings. As you can see the request frequency is far off from what it’s supposed to be and pretty irregular:

default (no remotePollInterval in cfg):

[15/Aug/2019:13:25:09 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:25:12 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:25:14 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:25:40 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:25:46 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:26:09 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:26:18 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:26:39 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:26:50 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:27:09 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:27:22 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:27:39 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:27:54 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:28:08 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:28:26 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:28:38 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:28:58 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207

remotePollInterval=60000:

[15/Aug/2019:13:35:18 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:35:20 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:35:20 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:35:49 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:37:15 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:37:24 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:37:56 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:38:15 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:38:28 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:39:00 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:39:15 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:39:32 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207

remotePollInterval=120000:

[15/Aug/2019:13:50:16 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:50:46 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:51:18 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:51:50 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:54:13 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:54:30 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:55:02 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:55:34 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:56:06 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:56:13 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:56:38 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:57:10 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207
[15/Aug/2019:13:57:42 +0200] "PROPFIND /remote.php/dav/files/admin/ HTTP/1.1" 207

Is this a bug or something I don’t understand how this setting is supposed to work?