Hello Aslain,
Thank you for checking it. Probably it means that it depends on something locally on my PC. Would it be possible to create logs that can contain something that may be useful to get closer to this issue? Can you give me some guidance on what to look for or verify to help in the investigation?
To be honest I did not faced the same issue on my older PC with a very similar, but older setup (WoT client installed version maybe 9.3 and updated to 9.5, and your modpack updated from an older version through many steps to 4.1.2). Is it possible that this issue appears on new installations only, but does not appear on older updated installations?
Additionally no one else commented to this post so it may mean that these issues do not appear at others...
Have you been able to check the uninstallation issue?
Furthermore I can see a lot of other issues where some of the components do not work since the 9.5 update, but those are not so annoying than these and I think/hope those will be corrected soon.