I’ve build and installed the 4.14.15-5 kernel from the february update (which came out the 5th of March ironically), using this post: Compile Kernel on RPI2 from RBP2-sources-osmc - #2 by DBMandrake (after cloning the git, use ‘git checkout commithash’, the commithash is found at the release page on Github)
And now I don’t have the kernel panics anymore, nor do my recordings get errors. I guess I won’t be updating my OSMC anymore.