Curl was at 7.88.1 at that point (https://github.com/LibreELEC/Libr…l/package.mk#L6) which is the same major version as in LE 11 (7.86) so that does not tell us much.
I believe there must have been a regression going to version 8 which is fixed in 8.9.1 (maybe it also works on versions in between 8.6.0 and 8.9.1, have not tested but on 8.6.0 it does not work for sure and on 8.9.1 works 
).
No, my first build had this patch already and it was not working.
Hi guys, I can confirm that the problem exists - tested on a self-built .ova image based on latest 21.1 kodi (commit 7938029863608416aaf85ee1dd2bb9cb84dc6d7b from LE repo).
I was able to fix the issue by upgrading the curl package to the latest version - 8.9.1 (previously was 8.6.0). Versions 8.7+ have some fixes related to FTP - https://curl.se/changes.html
